Rif Succah 4b {Succah 9a continues ... 9b}

HIDE/SHOW IMAGE
4b

{Succah 9a continues}
What is the reason of Bet Shammai?
The verse states {Vayikra 23:34}:

לד דַּבֵּר אֶל-בְּנֵי יִשְׂרָאֵל, לֵאמֹר: בַּחֲמִשָּׁה עָשָׂר יוֹם, לַחֹדֶשׁ הַשְּׁבִיעִי הַזֶּה, חַג הַסֻּכּוֹת שִׁבְעַת יָמִים, לַה.

34 Speak unto the children of Israel, saying: On the fifteenth day of this seventh month is the feast of tabernacles for seven days unto the LORD.

Make a succah for the purpose of the festival.
And Bet Hillel - that verse is required for that {statement} of Rav Sheshet. For Rav Sheshet cited Rabbi Akiva: How do we know that the wood of the succah is forbidden all seven? Thus it {the verse} teaches - חַג הַסֻּכּוֹת שִׁבְעַת יָמִים, לַה

And they learnt {in a brayta}: Rabbi Yehuda says: How do we know that just as the name of heaven applies to the chagiga, so does the name of heaven apply to the succah? Therefore it teaches - חַג הַסֻּכּוֹת שִׁבְעַת יָמִים, לַה - just as the chagiga is to Hashem, so is the succah to Hashem.

{Succah 9b}
Mishna:
If one constructs his succah underneath a tree, it is as if he constructed it within the house {and it is invalid}.