Rif Succah 12b {Succah 27a - 28a}

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12b

{Succah 27a}
Mishna:
Rabbi Eliezer says: One is required to eat 14 meals in the succah. One in the day and one in the night.
And the Sages say: There is no fixed bound to the matter, except for the night of the first day of Yom Tov.

And Rabbi Eliezer further said: One who did not eat on the night of the first day of Yom Tov may make up for it on the night of the last day of Yom Tov.
And the Sages say: There is no make-up for this matter, and upon this it is stated {Kohelet 1:15}:

טו מְעֻוָּת, לֹא-יוּכַל לִתְקֹן; וְחֶסְרוֹן, לֹא-יוּכַל לְהִמָּנוֹת.

15 That which is crooked cannot be made straight; and that which is wanting cannot be numbered.

Gemara:
"And the Sages say: There is no fixed bound to the matter...":
For we learn "the fifteenth" "the fifteenth" from Pesach. Just as by Pesach the first night is the obligation as it is written {Shemot 12:18}:

יח בָּרִאשֹׁן בְּאַרְבָּעָה עָשָׂר יוֹם לַחֹדֶשׁ, בָּעֶרֶב, תֹּאכְלוּ, מַצֹּת: עַד יוֹם הָאֶחָד וְעֶשְׂרִים, לַחֹדֶשׁ--בָּעָרֶב.

18 In the first month, on the fourteenth day of the month at even, ye shall eat unleavened bread, until the one and twentieth day of the month at even.

From there on in it is voluntary.

{Succah 27b}
They learnt {in a brayta}: Rabbi Eliezer says: One may not move from one succah to another succah, and one may not construct a succah during Chol haMoed. And the Sages say: One may from one succah to another succah, and one may construct a succah during Chol haMoed. And they are equal in that if the succah fell down, one may return and rebuild it during Chol haMoed.

They learnt {in a brayta}: Rabbi Eliezer says: Just as a man may not fulfill his obligation on the first day of Yom Tov with a lulav of his fellow, for it is written {Vayikra 23:40}:

מ וּלְקַחְתֶּם לָכֶם בַּיּוֹם הָרִאשׁוֹן, פְּרִי עֵץ הָדָר כַּפֹּת תְּמָרִים, וַעֲנַף עֵץ-עָבֹת, וְעַרְבֵי-נָחַל; וּשְׂמַחְתֶּם, לִפְנֵי יְהוָה אֱלֹהֵיכֶם--שִׁבְעַת יָמִים.

40 And ye shall take you on the first day the fruit of goodly trees, branches of palm-trees, and boughs of thick trees, and willows of the brook, and ye shall rejoice before the LORD your God seven days.

of your own, so too one cannot fulfill (*on the first day of Yom Tov) {but this should be emended out} in the succah of his fellow, for it is written {Devarim 16:13}:

יג חַג הַסֻּכֹּת תַּעֲשֶׂה לְךָ, שִׁבְעַת יָמִים: בְּאָסְפְּךָ--מִגָּרְנְךָ, וּמִיִּקְבֶךָ.

13 Thou shalt keep the feast of tabernacles seven days, after that thou hast gathered in from thy threshing-floor and from thy winepress.

of your own.
And the Sages say: Although they said that a person cannot fulfill his obligation with the lulav or his fellow on the first day of Yom Tov, even so he may fulfill his obligation in the succah of his fellow (*on the first day of Yom Tov) {but this should be emended out}. For it is written {Vayikra 23:42}:

מב בַּסֻּכֹּת תֵּשְׁבוּ, שִׁבְעַת יָמִים; כָּל-הָאֶזְרָח, בְּיִשְׂרָאֵל, יֵשְׁבוּ, בַּסֻּכֹּת.

42 Ye shall dwell in booths seven days; all that are home-born in Israel shall dwell in booths;

{and it is written chaser vav, such that sukkot appears singular sukkat. Thus,} this teaches that all of Israel are able to sit in one succah {and fulfill their obligation}.

{Succah 28a}
Mishna:
If one's head and majority {of his body} was in the succah, and his table was inside the house:
Bet Shammai invalidate and Bet Hillel validate.

Bet Hillel said to them: Was it not the case that the elders of Bet Shammai and the elders of Bet Hillel went to visit Rabbi Yochanan ben Hyrcanus, and they found his with his head and majority in the succah and his table inside the house, and they said not a word {of objection} to him?
Bet Shammai said to them: From there you have a proof? Indeed, they did say to him, "if you have so accustomed yourself, you have never fulfilled the mitzvah of succah in your days!"