In the case of a woman who is urinating and saw blood intermingled with the urine, Rabbi Meir says: If she urinated while standing she is ritually impure, as the blood could have originated in the uterus. And if she is sitting, she is ritually pure, as it is clear that the blood is from a wound. Rabbi Yosei says: Whether she urinates in this manner, i.e., standing, or whether she urinates in that manner, i.e., sitting, she is ritually pure.
In the case of a man and a woman who urinated into a basin [hasefel], and blood is found on the water in the basin, Rabbi Yosei deems her ritually pure. Even when it is clear that it is the blood of a woman who urinated, and there is only one uncertainty, Rabbi Yosei deems her ritually pure. In this case, there is a compound uncertainty: Did the blood originate with the man or with the woman, and did the blood come from the uterus or from a wound? And Rabbi Shimon deems her ritually impure, because there is only one uncertainty, as it is not the typical manner of the man to discharge blood with his urine; rather, the presumptive status of the blood is that it was discharged from the woman.
In a case where a woman lent her garment to a gentile woman or to a menstruating Jewish woman, and after the borrower returned the garment the owner wore it and then discovered a blood stain, she attributes the blood stain to the gentile or the menstruating woman. In a case of three women who wore one garment or who sat on one bench [safsal], one after the other, and the garment, or bench, was examined before the first of them donned it, or sat on it, and it was clean, and after the third one removed the garment, or stood up, a blood stain was discovered on the garment or on the bench, all the women are ritually impure. If they sat on a stone bench or on the bench [ha’itzteva] of a bathhouse, neither of which can become ritually impure, the first because it is stone and the second because it is attached to the floor of the bathhouse, and a blood stain was found on one of those benches, Rabbi Neḥemya deems all three women ritually pure, as Rabbi Neḥemya would say: Any item that is not susceptible to ritual impurity is not susceptible to ritual impurity due to blood stains. The decree of impurity due to blood stains was limited to items susceptible to ritual impurity.
In a case of three women who were sleeping in one bed and blood was discovered beneath one of them, all of them are ritually impure. If when the blood was discovered one of them examined herself and discovered that she was impure due to menstruation, she is impure and the other two are pure. And if none of them examined themselves, or if all of them examined themselves and were pure, they attribute the blood to each other, i.e., if one of them is unfit to menstruate, e.g., she is pregnant, she may attribute the blood to the other women who are fit to menstruate. And if all three women were not fit to see the flow of blood, e.g., they each belonged to one of the categories listed in the mishna on 7a, one considers them as though they were fit, and all three are impure, because the blood must have originated from one of them.
In a case of three women who were sleeping in one bed that was located adjacent to a wall, and blood was discovered beneath the middle woman, all of them are ritually impure. If the blood was discovered beneath the woman on the inside, closest to the wall, the two innermost women are ritually impure and the woman on the outside is ritually pure. If the blood was discovered beneath the woman on the outside, farthest from the wall, the two outermost women are ritually impure and the woman on the inside is ritually pure.When is that the ruling? It is when they passed into their positions on the bed via the foot of the bed; but if they passed into their positions on the bed via the side of the bed, over the place where the blood was discovered, all of them are ritually impure. If immediately after the blood was discovered, one of them examined herself and she was found to be ritually pure, she is pure and the other two are impure. If two of them examined themselves and found that they were ritually pure, they are pure and the third is impure. If all three of them examined themselves and found that they were ritually pure, all of them are ritually impure, as the blood must have originated from one of them. To what case is this matter comparable? It is similar to the case of a ritually impure pile of stones with an olive-bulk of a corpse beneath it, where this pile was intermingled with two ritually pure piles, and they examined one of them and found it pure. That pile is pure and the other two are impure. If they examined two of them and found them ritually pure, they are ritually pure and the third is impure. If they examined all three of them and found them ritually pure, all of them are impure; this is the statement of Rabbi Meir, as Rabbi Meir would say: With regard to any item that has the presumptive status of ritual impurity, it forever remains in its state of ritual impurity, even if one examined the relevant area or item and the source of impurity was not found, until it becomes known to you where the ritual impurity is. The assumption is that the impurity was not found because the examination was not conducted properly. And the Rabbis say: One continues searching the relevant area until he reaches bedrock or virgin soil, beneath which there is certainly no ritual impurity. If no ritual impurity is found at that stage, presumably an animal dragged the olive-bulk of the corpse from beneath the pile, and the pile of rocks is pure.
There are seven substances that one applies to the stain on a garment to ascertain whether it is a blood stain or a dye, as these seven substances remove the blood. They are: Tasteless saliva, and liquid from split beans, and urine, and natron, and borit,Cimolian earth [kamonya], and potash [eshlag]. If one immersed the garment with the stain whose nature is unknown and then handled ritually pure items with the garment, and then applied these seven substances to the stain and it did not disappear, that stain is presumably from a dye, and therefore the ritually pure items are pure, and he need not immerse the garment again, as there is no impurity. If the stain disappeared or if it faded, that is a blood stain, and the ritually pure items that he handled are impure, and he must immerse the garment again.
What is tasteless saliva? It is saliva that emerges from the mouth of any person who tasted nothing all night, when he first awakens in the morning. Liquid from split beans is created through the chewing of split beans that divided naturally, not by human hand, which is then applied to the stain. The urine that is an effective detergent is specifically urine that fermented for three days. And one must rub each and every one of the substances three times over the stain, and one must apply them separately, and one must apply them in the order they are listed in the mishna. If one applied them in a manner that is not in their prescribed order, or if one applied all seven substances simultaneously, he has done nothing. One cannot determine by means of that examination whether it is blood or a dye.
For any woman who has a fixed menstrual cycle that is not time dependent, but is dependent on a physical sensation, her time is sufficient, i.e., she does not transmit ritual impurity retroactively, for twenty-four hours or until the last time she examined herself (see 2a). And these are the fixed menstrual cycles based on sensation: When a woman menstruates after she yawns [mefaheket], or after she sneezes, or after she senses pain near her stomach or in her lower abdomen, or after she secretes a discharge, or after a type of feverish shuddering [tzemarmorot] overtakes her. And likewise the same applies with regard to any sensation of the like. And in the case of any woman who establishes a pattern for herself by experiencing such a sensation three times before the onset of menstruation, that is a fixed menstrual cycle.
If a woman was accustomed to see the flow of blood at the beginning of the sensation that accompanies her fixed cycle, even if on one occasion she happened to experience bleeding only at the end of the sensation, all the ritually pure items that she handled within the duration of that sensation that accompanies her fixed cycle are ritually impure. If the woman was accustomed to experience bleeding at the end of the sensation that accompanies her fixed cycle, all the ritually pure items that she handled within the duration of that sensation that accompanies her fixed cycle are pure.Rabbi Yosei says: Even specific days and specific hours determine a fixed menstrual cycle: If a woman was accustomed to see the flow of blood on a certain day of the month at sunrise, it is prohibited for her to engage in intercourse with her husband only at sunrise; but during the night before and the following day, it is permitted for her to engage in intercourse. Rabbi Yehuda says: Once sunrise passed and she did not menstruate, the entire day is hers and she may engage in intercourse, in accordance with the opinion of Rabbi Yosei; but contrary to the opinion of Rabbi Yosei, intercourse the night before is prohibited.
If the woman was accustomed to see the flow of blood on the fifteenth day and she deviated from the norm to see the flow of blood on the twentieth day, then on both this day, the fifteenth, and that day, the twentieth, it is prohibited for her to engage in intercourse. If she deviated from the norm twice, then on both this day, the fifteenth, and that day, the twentieth, it is likewise prohibited for her to engage in intercourse. If she deviated from the norm to see the flow of blood on the twentieth day three times, it becomes permitted for her to engage in intercourse on the fifteenth, and she has established the twentieth day for herself as the day of her fixed menstrual cycle, as a woman establishes a fixed menstrual cycle only after she establishes it three times. And a woman is purified from the existing fixed menstrual cycle, in the sense that intercourse is permitted on that day, only when she has been displaced from that day three times.
Women, with regard to the blood that flows when their hymens are ruptured, are like grapevines: There is a vine that produces wine that is red, and there is a vine that produces wine that is black; and there is a vine that produces wine in abundance, and there is a vine that produces only a meager amount of wine. Rabbi Yehuda says: In every vine, there are grapes fit to produce wine, but any vine in which there are no grapes fit to produce wine, this is a dry vine [durkati]. Likewise, any woman who experiences bleeding is capable of giving birth, whereas one who does not experience bleeding is like a dry vine, unable to give birth.
הָאִשָּׁה שֶׁהִיא עוֹשָׂה צְרָכֶיהָ וְרָאֲתָה דָם, רַבִּי מֵאִיר אוֹמֵר, אִם עוֹמֶדֶת, טְמֵאָה. וְאִם יוֹשֶׁבֶת, טְהוֹרָה. רַבִּי יוֹסֵי אוֹמֵר, בֵּין כָּךְ וּבֵין כָּךְ, טְהוֹרָה:
In the case of a woman who is urinating and saw blood intermingled with the urine, Rabbi Meir says: If she urinated while standing she is ritually impure, as the blood could have originated in the uterus. And if she is sitting, she is ritually pure, as it is clear that the blood is from a wound. Rabbi Yosei says: Whether she urinates in this manner, i.e., standing, or whether she urinates in that manner, i.e., sitting, she is ritually pure.
אִישׁ וְאִשָּׁה שֶׁעָשׂוּ צְרָכֵיהֶן לְתוֹךְ הַסֵּפֶל וְנִמְצָא דָם עַל הַמַּיִם, רַבִּי יוֹסֵי מְטַהֵר. וְרַבִּי שִׁמְעוֹן מְטַמֵּא, שֶׁאֵין דֶּרֶךְ הָאִישׁ לְהוֹצִיא דָם, אֶלָּא שֶׁחֶזְקַת דָּמִים מִן הָאִשָּׁה:
In the case of a man and a woman who urinated into a basin [hasefel], and blood is found on the water in the basin, Rabbi Yosei deems her ritually pure. Even when it is clear that it is the blood of a woman who urinated, and there is only one uncertainty, Rabbi Yosei deems her ritually pure. In this case, there is a compound uncertainty: Did the blood originate with the man or with the woman, and did the blood come from the uterus or from a wound? And Rabbi Shimon deems her ritually impure, because there is only one uncertainty, as it is not the typical manner of the man to discharge blood with his urine; rather, the presumptive status of the blood is that it was discharged from the woman.
הִשְׁאִילָה חֲלוּקָהּ לְנָכְרִית אוֹ לְנִדָּה, הֲרֵי זוֹ תּוֹלָה בָהּ. שָׁלשׁ נָשִׁים שֶׁלָּבְשׁוּ חָלוּק אֶחָד אוֹ שֶׁיָּשְׁבוּ עַל סַפְסָל אֶחָד, וְנִמְצָא עָלָיו דָּם, כֻּלָּן טְמֵאוֹת. יָשְׁבוּ עַל סַפְסָל שֶׁל אֶבֶן אוֹ עַל הָאִצְטַבָּא שֶׁל מֶרְחָץ, רַבִּי נְחֶמְיָה מְטַהֵר, שֶׁהָיָה רַבִּי נְחֶמְיָה אוֹמֵר, כָּל דָּבָר שֶׁאֵינוֹ מְקַבֵּל טֻמְאָה, אֵינוֹ מְקַבֵּל כְּתָמִים:
In a case where a woman lent her garment to a gentile woman or to a menstruating Jewish woman, and after the borrower returned the garment the owner wore it and then discovered a blood stain, she attributes the blood stain to the gentile or the menstruating woman. In a case of three women who wore one garment or who sat on one bench [safsal], one after the other, and the garment, or bench, was examined before the first of them donned it, or sat on it, and it was clean, and after the third one removed the garment, or stood up, a blood stain was discovered on the garment or on the bench, all the women are ritually impure. If they sat on a stone bench or on the bench [ha’itzteva] of a bathhouse, neither of which can become ritually impure, the first because it is stone and the second because it is attached to the floor of the bathhouse, and a blood stain was found on one of those benches, Rabbi Neḥemya deems all three women ritually pure, as Rabbi Neḥemya would say: Any item that is not susceptible to ritual impurity is not susceptible to ritual impurity due to blood stains. The decree of impurity due to blood stains was limited to items susceptible to ritual impurity.
שָׁלשׁ נָשִׁים שֶׁהָיוּ יְשֵׁנוֹת בְּמִטָּה אַחַת וְנִמְצָא דָם תַּחַת אַחַת מֵהֶן, כֻּלָּן טְמֵאוֹת. בָּדְקָה אַחַת מֵהֶן וְנִמְצֵאת טְמֵאָה, הִיא טְמֵאָה וּשְׁתֵּיהֶן טְהוֹרוֹת, וְתוֹלוֹת זוֹ בָזוֹ. וְאִם לֹא הָיוּ רְאוּיוֹת לִרְאוֹת, רוֹאִין אוֹתָן כְּאִלּוּ הֵן רְאוּיוֹת:
In a case of three women who were sleeping in one bed and blood was discovered beneath one of them, all of them are ritually impure. If when the blood was discovered one of them examined herself and discovered that she was impure due to menstruation, she is impure and the other two are pure. And if none of them examined themselves, or if all of them examined themselves and were pure, they attribute the blood to each other, i.e., if one of them is unfit to menstruate, e.g., she is pregnant, she may attribute the blood to the other women who are fit to menstruate. And if all three women were not fit to see the flow of blood, e.g., they each belonged to one of the categories listed in the mishna on 7a, one considers them as though they were fit, and all three are impure, because the blood must have originated from one of them.
שָׁלשׁ נָשִׁים שֶׁהָיוּ יְשֵׁנוֹת בְּמִטָּה אַחַת וְנִמְצָא דָם תַּחַת הָאֶמְצָעִית, כֻּלָּן טְמֵאוֹת. תַּחַת הַפְּנִימִית, שְׁתַּיִם הַפְּנִימִיּוֹת טְמֵאוֹת וְהַחִיצוֹנָה טְהוֹרָה. תַּחַת הַחִיצוֹנָה, שְׁתַּיִם הַחִיצוֹנוֹת טְמֵאוֹת וְהַפְּנִימִית טְהוֹרָה. אָמַר רַבִּי יְהוּדָה, אֵימָתַי, בִּזְמַן שֶׁעָבְרוּ דֶרֶךְ מַרְגְּלוֹת הַמִּטָּה. אֲבָל אִם עָבְרוּ שְׁלָשְׁתָּן דֶּרֶךְ עָלֶיהָ, כֻּלָּן טְמֵאוֹת. בָּדְקָה אַחַת מֵהֶן וְנִמְצֵאת טְהוֹרָה, הִיא טְהוֹרָה וּשְׁתַּיִם טְמֵאוֹת. בָּדְקוּ שְׁתַּיִם וּמָצְאוּ טְהוֹרוֹת, הֵן טְהוֹרוֹת וְהַשְּׁלִישִׁית טְמֵאָה. שְׁלָשְׁתָּן וּמָצְאוּ טְהוֹרוֹת, כֻּלָּן טְמֵאוֹת. לְמַה הַדָּבָר דּוֹמֶה, לְגַל טָמֵא שֶׁנִּתְעָרֵב בֵּין שְׁנֵי גַלִּים טְהוֹרִים, וּבָדְקוּ אַחַד מֵהֶן וּמָצְאוּ טָהוֹר, הוּא טָהוֹר וּשְׁנַיִם טְמֵאִין. שְׁנַיִם וּמָצְאוּ טְהוֹרִים, הֵם טְהוֹרִים וְהַשְּׁלִישִׁי טָמֵא. שְׁלָשְׁתָּן וּמָצְאוּ טְהוֹרִים, כֻּלָּן טְמֵאִים, דִּבְרֵי רַבִּי מֵאִיר, שֶׁהָיָה רַבִּי מֵאִיר אוֹמֵר, כָּל דָּבָר שֶׁהוּא בְחֶזְקַת טֻמְאָה, לְעוֹלָם הוּא בְטֻמְאָתוֹ, עַד שֶׁיִּוָּדַע לְךָ, טֻמְאָה הֵיכָן הִיא. וַחֲכָמִים אוֹמְרִים, בּוֹדֵק עַד שֶׁמַּגִּיעַ לְסֶלַע אוֹ לִבְתוּלָה:
In a case of three women who were sleeping in one bed that was located adjacent to a wall, and blood was discovered beneath the middle woman, all of them are ritually impure. If the blood was discovered beneath the woman on the inside, closest to the wall, the two innermost women are ritually impure and the woman on the outside is ritually pure. If the blood was discovered beneath the woman on the outside, farthest from the wall, the two outermost women are ritually impure and the woman on the inside is ritually pure. When is that the ruling? It is when they passed into their positions on the bed via the foot of the bed; but if they passed into their positions on the bed via the side of the bed, over the place where the blood was discovered, all of them are ritually impure. If immediately after the blood was discovered, one of them examined herself and she was found to be ritually pure, she is pure and the other two are impure. If two of them examined themselves and found that they were ritually pure, they are pure and the third is impure. If all three of them examined themselves and found that they were ritually pure, all of them are ritually impure, as the blood must have originated from one of them. To what case is this matter comparable? It is similar to the case of a ritually impure pile of stones with an olive-bulk of a corpse beneath it, where this pile was intermingled with two ritually pure piles, and they examined one of them and found it pure. That pile is pure and the other two are impure. If they examined two of them and found them ritually pure, they are ritually pure and the third is impure. If they examined all three of them and found them ritually pure, all of them are impure; this is the statement of Rabbi Meir, as Rabbi Meir would say: With regard to any item that has the presumptive status of ritual impurity, it forever remains in its state of ritual impurity, even if one examined the relevant area or item and the source of impurity was not found, until it becomes known to you where the ritual impurity is. The assumption is that the impurity was not found because the examination was not conducted properly. And the Rabbis say: One continues searching the relevant area until he reaches bedrock or virgin soil, beneath which there is certainly no ritual impurity. If no ritual impurity is found at that stage, presumably an animal dragged the olive-bulk of the corpse from beneath the pile, and the pile of rocks is pure.
שִׁבְעָה סַמָּנִין מַעֲבִירִין עַל הַכֶּתֶם. רֹק תָּפֵל, וּמֵי גְרִיסִין, וּמֵי רַגְלַיִם, וְנֶתֶר, וּבוֹרִית, קְמוּנְיָא, וְאֶשְׁלָג. הִטְבִּילוֹ וְעָשָׂה עַל גַּבָּיו טָהֳרוֹת, הֶעֱבִיר עָלָיו שִׁבְעָה סַמָּנִין וְלֹא עָבַר, הֲרֵי זֶה צֶבַע, הַטָּהֳרוֹת טְהוֹרוֹת, וְאֵינוֹ צָרִיךְ לְהַטְבִּיל. עָבַר אוֹ שֶׁדֵּהָה, הֲרֵי זֶה כֶתֶם, וְהַטָּהֳרוֹת טְמֵאוֹת, וְצָרִיךְ לְהַטְבִּיל:
There are seven substances that one applies to the stain on a garment to ascertain whether it is a blood stain or a dye, as these seven substances remove the blood. They are: Tasteless saliva, and liquid from split beans, and urine, and natron, and borit, Cimolian earth [kamonya], and potash [eshlag]. If one immersed the garment with the stain whose nature is unknown and then handled ritually pure items with the garment, and then applied these seven substances to the stain and it did not disappear, that stain is presumably from a dye, and therefore the ritually pure items are pure, and he need not immerse the garment again, as there is no impurity. If the stain disappeared or if it faded, that is a blood stain, and the ritually pure items that he handled are impure, and he must immerse the garment again.
אֵיזֶהוּ רֹק תָּפֵל, כֹּל שֶׁלֹּא טָעַם כְּלוּם. מֵי גְרִיסִין, לְעִסַּת גְּרִיסִין שֶׁל פּוֹל, חֲלוּקַת נָפֶשׁ. מֵי רַגְלַיִם, שֶׁהֶחֱמִיצוּ. וְצָרִיךְ לְכַסְכֵּס שָׁלשׁ פְּעָמִים לְכָל אֶחָד וְאֶחָד. הֶעֶבִירָן שֶׁלֹּא כְסִדְרָן, אוֹ שֶׁהֶעֱבִיר שִׁבְעָה סַמָּנִין כְּאַחַת, לֹא עָשָׂה וְלֹא כְלוּם:
What is tasteless saliva? It is saliva that emerges from the mouth of any person who tasted nothing all night, when he first awakens in the morning. Liquid from split beans is created through the chewing of split beans that divided naturally, not by human hand, which is then applied to the stain. The urine that is an effective detergent is specifically urine that fermented for three days. And one must rub each and every one of the substances three times over the stain, and one must apply them separately, and one must apply them in the order they are listed in the mishna. If one applied them in a manner that is not in their prescribed order, or if one applied all seven substances simultaneously, he has done nothing. One cannot determine by means of that examination whether it is blood or a dye.
כָּל אִשָּׁה שֶׁיֶּשׁ לָהּ וֶסֶת, דַּיָּהּ שְׁעָתָהּ. וְאֵלּוּ הֵן הַוְּסָתוֹת, מְפַהֶקֶת, וּמְעַטֶּשֶׁת, וְחוֹשֶׁשֶׁת בְּפִי כְרֵסָהּ, וּבְשִׁפּוּלֵי מֵעֶיהָ, וְשׁוֹפַעַת, וּכְמִין צְמַרְמוֹרוֹת אוֹחֲזִין אוֹתָהּ, וְכֵן כַּיּוֹצֵא בָהֶן. וְכֹל שֶׁקָּבְעָה לָהּ שָׁלשׁ פְּעָמִים, הֲרֵי זוֹ וָסֶת:
For any woman who has a fixed menstrual cycle that is not time dependent, but is dependent on a physical sensation, her time is sufficient, i.e., she does not transmit ritual impurity retroactively, for twenty-four hours or until the last time she examined herself (see 2a). And these are the fixed menstrual cycles based on sensation: When a woman menstruates after she yawns [mefaheket], or after she sneezes, or after she senses pain near her stomach or in her lower abdomen, or after she secretes a discharge, or after a type of feverish shuddering [tzemarmorot] overtakes her. And likewise the same applies with regard to any sensation of the like. And in the case of any woman who establishes a pattern for herself by experiencing such a sensation three times before the onset of menstruation, that is a fixed menstrual cycle.
הָיְתָה לְמוּדָה לִהְיוֹת רוֹאָה בִתְחִלַּת הַוְּסָתוֹת, כָּל הַטָּהֳרוֹת שֶׁעָשְׂתָה בְתוֹךְ הַוְּסָתוֹת, טְמֵאוֹת. בְּסוֹף הַוְּסָתוֹת, כָּל הַטָּהֳרוֹת שֶׁעָשְׂתָה בְתוֹךְ הַוְּסָתוֹת, טְהוֹרוֹת. רַבִּי יוֹסֵי אוֹמֵר, אַף יָמִים וְשָׁעוֹת, וְסָתוֹת. הָיְתָה לְמוּדָה לִהְיוֹת רוֹאָה עִם הָנֵץ הַחַמָּה, אֵינָהּ אֲסוּרָה אֶלָּא עִם הָנֵץ הַחַמָּה. רַבִּי יְהוּדָה אוֹמֵר, כָּל הַיּוֹם שֶׁלָּהּ:
If a woman was accustomed to see the flow of blood at the beginning of the sensation that accompanies her fixed cycle, even if on one occasion she happened to experience bleeding only at the end of the sensation, all the ritually pure items that she handled within the duration of that sensation that accompanies her fixed cycle are ritually impure. If the woman was accustomed to experience bleeding at the end of the sensation that accompanies her fixed cycle, all the ritually pure items that she handled within the duration of that sensation that accompanies her fixed cycle are pure. Rabbi Yosei says: Even specific days and specific hours determine a fixed menstrual cycle: If a woman was accustomed to see the flow of blood on a certain day of the month at sunrise, it is prohibited for her to engage in intercourse with her husband only at sunrise; but during the night before and the following day, it is permitted for her to engage in intercourse. Rabbi Yehuda says: Once sunrise passed and she did not menstruate, the entire day is hers and she may engage in intercourse, in accordance with the opinion of Rabbi Yosei; but contrary to the opinion of Rabbi Yosei, intercourse the night before is prohibited.
הָיְתָה לְמוּדָה לִהְיוֹת רוֹאָה יוֹם חֲמִשָּׁה עָשָׂר וְשִׁנְּתָה לִהְיוֹת רוֹאָה לְיוֹם עֶשְׂרִים, זֶה וָזֶה אֲסוּרִין. שִׁנְּתָה פַעֲמַיִם לְיוֹם עֶשְׂרִים, זֶה וָזֶה אֲסוּרִין. שִׁנְּתָה שָׁלשׁ פְּעָמִים לְיוֹם עֶשְׂרִים, הֻתַּר חֲמִשָּׁה עָשָׂר וְקָבְעָה לָהּ יוֹם עֶשְׂרִים, שֶׁאֵין אִשָּׁה קוֹבַעַת לָהּ וֶסֶת, עַד שֶׁתִּקְבָּעֶנָּה שָׁלשׁ פְּעָמִים. וְאֵינָהּ מִטַּהֶרֶת הַוֶּסֶת, עַד שֶׁתֵּעָקֵר מִמֶּנָּה שָׁלשׁ פְּעָמִים:
If the woman was accustomed to see the flow of blood on the fifteenth day and she deviated from the norm to see the flow of blood on the twentieth day, then on both this day, the fifteenth, and that day, the twentieth, it is prohibited for her to engage in intercourse. If she deviated from the norm twice, then on both this day, the fifteenth, and that day, the twentieth, it is likewise prohibited for her to engage in intercourse. If she deviated from the norm to see the flow of blood on the twentieth day three times, it becomes permitted for her to engage in intercourse on the fifteenth, and she has established the twentieth day for herself as the day of her fixed menstrual cycle, as a woman establishes a fixed menstrual cycle only after she establishes it three times. And a woman is purified from the existing fixed menstrual cycle, in the sense that intercourse is permitted on that day, only when she has been displaced from that day three times.
נָשִׁים בִּבְתוּלֵיהֶם כַּגְּפָנִים. יֵשׁ גֶּפֶן שֶׁיֵּינָהּ אָדֹם, וְיֵשׁ גֶּפֶן שֶׁיֵּינָהּ שָׁחֹר, וְיֵשׁ גֶּפֶן שֶׁיֵּינָהּ מְרֻבֶּה, וְיֵשׁ גֶּפֶן שֶׁיֵּינָהּ מֻעָט. רַבִּי יְהוּדָה אוֹמֵר, כָּל גֶּפֶן יֶשׁ בָּהּ יַיִן. וְשֶׁאֵין בָּהּ יַיִן, הֲרֵי זֶה דּוֹרְקְטִי:
Women, with regard to the blood that flows when their hymens are ruptured, are like grapevines: There is a vine that produces wine that is red, and there is a vine that produces wine that is black; and there is a vine that produces wine in abundance, and there is a vine that produces only a meager amount of wine. Rabbi Yehuda says: In every vine, there are grapes fit to produce wine, but any vine in which there are no grapes fit to produce wine, this is a dry vine [durkati]. Likewise, any woman who experiences bleeding is capable of giving birth, whereas one who does not experience bleeding is like a dry vine, unable to give birth.