Rif Succah 21a {Succah 42b continues; 43a}

HIDE/SHOW IMAGE
21a

{Succah 42b continues}
Mishna:
The lulav, and the willow {used to circle the altar are taken} six and seven {days}.
The Hallel and rejoicing eight.
Succah and pouring of the water {nisuch hamayim} seven.
And the flute five and six.

Lulav, seven - how so? If the first day of Yom Tov falls out on Shabbat, the lulav seven {days, since the lulav will still be taken on this first day}. And {if the first day of Yom Tov falls out on any other day {of the week}, six.

Gemara:
"And any other day of the week, six"
And why? It is simply moving -- let it push off Shabbat {restrictions}!
Rabba said: As a decree lest he take it in his hand and go to an expert to teach,
{Succah 43a}
and carry it four cubits in the public domain.
And this is the reason for shofar, and this is the reason for megillah.

If so, the first day {which falls out on Shabbat,} also! The first day which has foundation in the Torah, in the gevulin {outside the Temple; or perhaps outside Yerushalayim. this is a machloket rishonim} the Sages did not decree. These {subsequent days}, which lack a foundation in the Torah, in the gevulin the Sages decreed on it.

If so, nowadays let us push it {Shabbat} off {on the first day}! We do not know the establishment of the new moon. So let those who know of the establishing of the new moon, let us push it off! Since we do not push it off, they too do not push it {Shabbat} off.