(Devarim 24:21) "When you cut your vineyard, do not glean it after you": From here R. Eliezer ruled: A vineyard which is all oleloth (gleanings) belongs to the owner. R. Akiva says: It belongs to the poor, it being written (Vayikra 19:10) "And you shall not glean your vineyard."
"do not glean it": Which are "gleanings"? Those which have neither "arm" nor "dripping." If they have "arm" but not "dripping" or "dripping," but not "arm," they belong to the owner; if not, they belong to the poor. ("do not glean it) after you": whence we derive that they are subject to shikchah.
"after you": whence we derive that they are subject to peah. From here they ruled: What is shikchah in an arbor? All that he cannot stretch out his hand for and take. And in runners (grapes growing in a row on isolated vines), whatever he passes by.
"to the stranger, to the orphan, and to the widow shall it be": It is written here "stranger," "orphan," and elsewhere (Ibid. 19) "stranger," "orphan." Just as there (it is shikchah) only when it contains less than two sa'ah, so, here.
(דברים כד כא) כִּי תִבְצֹר כַּרְמְךָ, מִכָּן הָיָה רַבִּי אֱלִיעֶזֶר אוֹמֵר: כֶּרֶם שֶׁכֻּלּוֹ עוֹלֵלוֹת – לְבַעַל הַבַּיִת. רַבִּי עֲקִיבָא אוֹמֵר: לָעֲנִיִּים.
(Devarim 24:21) "When you cut your vineyard, do not glean it after you": From here R. Eliezer ruled: A vineyard which is all oleloth (gleanings) belongs to the owner. R. Akiva says: It belongs to the poor, it being written (Vayikra 19:10) "And you shall not glean your vineyard."
לֹא תְעוֹלֵל, אֵיזוֹ הִיא עוֹלֶלֶת? כָּל שֶׁאֵין לָהּ לֹא כָתֵף וְלֹא נָטֵף. יֵשׁ לָהּ כָּתֵף וְאֵין לָהּ נָטֵף, יֵשׁ לָהּ נָטֵף וְאֵין לָהּ כָּתֵף, הֲרֵי הִיא שֶׁל בַּעַל הַבַּיִת; וְאִם לָאו, הֲרֵי הֵם שֶׁל עֲנִיִּים.
"do not glean it": Which are "gleanings"? Those which have neither "arm" nor "dripping." If they have "arm" but not "dripping" or "dripping," but not "arm," they belong to the owner; if not, they belong to the poor. ("do not glean it) after you": whence we derive that they are subject to shikchah.
אַחֲרֶיךָ, מְלַמֵּד שֶׁיֵּשׁ לוֹ שִׁכְחָה. אַחֲרֶיךָ, מְלַמֵּד שֶׁיֵּשׁ לוֹ פֵּאָה. מִכָּן אָמְרוּ: אֵיזוֹ הִיא שִׁכְחָה בֶּעָרִיס? כָּל שֶׁאֵינוֹ יָכוֹל לִפְשֹׁט אֶת יָדוֹ וְלִטְּלָהּ. בָּרַגְלִיּוֹת, מִשֶּׁיַּעֲבֹר הֵימֶנָּה.
"after you": whence we derive that they are subject to peah. From here they ruled: What is shikchah in an arbor? All that he cannot stretch out his hand for and take. And in runners (grapes growing in a row on isolated vines), whatever he passes by.
גֵּר יָתוֹם, נֶאֱמַר כָּאן גֵּר וְיָתוֹם וְנֶאֱמַר לְהַלָּן גֵּר וְיָתוֹם, מַה גֵּר וְיָתוֹם הָאָמוּר לְהַלָּן בְּעוֹשֶׂה סָאתַיִם אַף גֵּר וְיָתוֹם הָאָמוּר כָּאן בְּעוֹשֶׂה סָאתַיִם.
"to the stranger, to the orphan, and to the widow shall it be": It is written here "stranger," "orphan," and elsewhere (Ibid. 19) "stranger," "orphan." Just as there (it is shikchah) only when it contains less than two sa'ah, so, here.