(Devarim 18:7) "And he shall serve in the name of the L-rd his G-d, as all his brothers, the Levites, who stand there before the L-rd": He stands upon the floor. From here they ruled: If he sat or stood upon vessels or upon a beast or upon the feet of his fellow, (his service) is invalid.
Whence is it derived that all of the watches share equally in the devoted portions of the offerings and in the portion of the show-bread? From (Ibid. 8) "Portion as portion shall they eat, viz.: Just as they share in the sacrificial service, so they share in the eating (of the show-bread).
I might think that the same held true for (obligatory) offerings brought on the festival not for the sake of the festival (i.e., that with these, too, all watches served and shared alike); it is, therefore, written (Ibid.) "aside from the sale of the fathers" — what the fathers sold to each other, i.e., "I on my Sabbath and you on your Sabbath."
(דברים יח ז) וְשֵׁרֵת בְּשֵׁם ה׳ אֱלֹהָיו, עַל גַּבֵּי הָרִצְפָּה. מִכָּן אַתָּה אוֹמֵר (זבחים פ״ב מ״א): עָרֵל, טָמֵא, יוֹשֵׁב, עוֹמֵד עַל גַּבֵּי כֵּלִים, אוֹ עַל גַּבֵּי בְּהֵמָה אוֹ עַל גַּבֵּי רַגְלֵי חֲבֵרוֹ – פָּסוּל.
(Devarim 18:7) "And he shall serve in the name of the L-rd his G-d, as all his brothers, the Levites, who stand there before the L-rd": He stands upon the floor. From here they ruled: If he sat or stood upon vessels or upon a beast or upon the feet of his fellow, (his service) is invalid.
מִנַּיִן אַתָּה אוֹמֵר (סוכה פ״ה מ״ז) כָּל הַמִּשְׁמָרוֹת שָׁוִים בְּאֵימוּרֵי רְגָלִים וּבְחִלּוּק לֶחֶם הַפָּנִים? תַּלְמוּד לוֹמַר (דברים יח ח): ״חֵלֶק כְּחֵלֶק יֹאכֵלוּ״, חֵלֶק לֶאֱכוֹל, חֵלֶק לַעֲבוֹד; חֵלֶק לָאֲכִילָה כְּחֵלֶק לָעֲבוֹדָה.
Whence is it derived that all of the watches share equally in the devoted portions of the offerings and in the portion of the show-bread? From (Ibid. 8) "Portion as portion shall they eat, viz.: Just as they share in the sacrificial service, so they share in the eating (of the show-bread).
יָכוֹל כָּל הַמִּשְׁמָרוֹת שָׁוִים בְּקָרְבְּנוֹת הָרֶגֶל הַבָּאִים שֶׁלֹּא מֵחֲמַת הָרֶגֶל? תַּלְמוּד לוֹמַר: ״לְבַד מִמְכָּרָיו עַל הָאָבוֹת״. מַה מָּכְרוּ אָבוֹת זֶה לָזֶה? אַתָּה שַׁבַּתְּךָ וַאֲנִי שַׁבַּתִּי.
I might think that the same held true for (obligatory) offerings brought on the festival not for the sake of the festival (i.e., that with these, too, all watches served and shared alike); it is, therefore, written (Ibid.) "aside from the sale of the fathers" — what the fathers sold to each other, i.e., "I on my Sabbath and you on your Sabbath."