Yerushalmi Sukkah 4:1 ירושלמי סוכה ד׳:א׳

MISHNAH: Lulav and willow six and seven¹The entire Chapter only refers to the service in the Temple. The willow twigs referred to here are not those tied to the lulav; these are subsumed under the name of lulav and are not mentioned further, just as the myrtle branches are not mentioned. The willow twigs are large ones used around the altar, as described in Mishnah 4. The numbers mentioned refer to the number of days the corresponding action is required. If the Sabbath of the holiday week was not the first day, the willow twigs to surround the altar were not brought on the Sabbath.; Hallel and joy eight²These apply both on the seven days of Tabernacles and on the additional final holiday (Num. 29:35) which is separate from Tabernacles.. Sukkah and water libation seven³Since no Sabbath violation is possibly connected with these, they are obligatory all seven days of Tabernacles., and the fife five and six⁴The fife accompanying the nightly festivities of drawing the water for next day’s libation, impossible both on the full holiday and on the Sabbath.. When is the lulav seven? If the first day of Tabernacles falls on a Sabbath, the lulav is taken seven times; on all other days six⁵If the first day of the holiday is a Sabbath, the use of the lulav in the Temple is prescribed by Lev. 23:40 and therefore supersedes any possible Sabbath violation. But the Sabbath on any other day of the holiday week has precedence and prevents the taking of the lulav. Similarly, the willows to surround the altar were carried on the seventh day even if it was a Sabbath since one holds that on that day it is a biblical command, as explained in the Halakhah..
How the willow seven? If the seventh day of willow falls on a Sabbath, the willow is seven {days}, on all other days six⁵If the first day of the holiday is a Sabbath, the use of the lulav in the Temple is prescribed by Lev. 23:40 and therefore supersedes any possible Sabbath violation. But the Sabbath on any other day of the holiday week has precedence and prevents the taking of the lulav. Similarly, the willows to surround the altar were carried on the seventh day even if it was a Sabbath since one holds that on that day it is a biblical command, as explained in the Halakhah..

HALAKHAH: “Lulav and willow six and seven,” etc. ⁶This paragraph is copied in Ševi`it1:7 (Notes 48–58, שׁ). Rebbi Ze`ira, Rebbi Ila, Rebbi Yasa in the name of Rebbi Joḥanan: The “willow”¹The entire Chapter only refers to the service in the Temple. The willow twigs referred to here are not those tied to the lulav; these are subsumed under the name of lulav and are not mentioned further, just as the myrtle branches are not mentioned. The willow twigs are large ones used around the altar, as described in Mishnah 4. The numbers mentioned refer to the number of days the corresponding action is required. If the Sabbath of the holiday week was not the first day, the willow twigs to surround the altar were not brought on the Sabbath. is practice going back to Moses on Mount Sinai. This is against Abba Shaul⁷Halakhah 3:3, Babli 34a., since Abba Shaul said, the willow is a word of the Torah: and brook willows, two. One willow for the lulav, the other willow for the Temple. Rebbi Abba, Rebbi Ḥiyya in the name of Rebbi Joḥanan: willow and pouring water are practice going back to Moses on Mount Sinai⁸Babli 34a.. This is against Rebbi Aqiba⁹In Sifry Num. 250 the argument is given in the name of R. Jehudah ben Bathyra, with different arguments ascribed to R. Aqiba and R. Nathan. The argument notes that in Num. 29 the sacrifices for the different days of Tabernacles are given in stereotyped language; the words noted are deviations from the usual ונסכה, כמשפט. R. Aqiba’s argument is presented differently in the Babli, Zevaḥim 110b., since Rebbi Aqiba said the pouring of water is a word of the Torah: On the second day and their libations¹⁰Num. 29:19.. On the sixth say, and its libations¹¹Num. 29:31.. On the seventh day, and its rules¹²Num. 29:33.. מ י מ spells “water”. Rebbi Ḥiyya bar Abba asked before Rebbi Joḥanan, why does one now plough because of old trees13? He said to him, when the practice was established it was given so that when they desired to plough they might plough. Rebbi Abba bar Zavda in the name of Rebbi Onias from Hauran: Willow, water libation, and ten saplings¹⁴The rule (Mishnah Ševi`it1:7) that ten tree saplings planted over a surface area of a bet seah(5’000 square cubits) may be tended up to New Year’s Day. are institution of the prophets¹⁵Babli 44a; Moed qaṭan3b.. Do they disagree? Rebbi Yose ben Rebbi Abun in the name of Levi: That was the current practice; they forgot it, but the later ones got up and agreed to the opinion of the earlier ones to teach you that everything the court insists on will come to be in the end just as Moses was told on Sinai, as Rebbi Mana said, for it is not an empty word¹⁶Deut. 32:47., if it is empty it is from you. Why? Because you do not exert yourselves. Because it is your life; when is it your life? At the time that you exert yourselves. Rebbi Joḥanan said to Rebbi Ḥiyya bar Abba: Babylonian, two things came from you¹⁷They are Babylonian customs introduced into Palestine., prostrating oneself on the fast day¹⁸Prostrating oneself in the re-enactment of the High Priest’s service on the Day of Atonement (Avodah zarah4:1, Note 18)., and the willow of the seventh day¹⁹Using separate willow twigs on the seventh day of Tabernacles in the prayers for winter rains. Confirmed in the Babli, 44a.. The rabbis of Caesarea say, also the moving²⁰According to J. Levy, the root is קזז “to push aside, to move”. It refers to the calendar rule given by R. Simon in the following. It is established in Mishnah Roš Haššanah 2:11–12 that rabbinic Judaism permits a computed calendar which may deviate from the exact astronomical data. This is used to make sure that the Day of Atonement be neither Friday nor Sunday, since in those cases it would be difficult either to prepare a meal for breaking the fast or one to prepare for the fast. The calendar rules allow for one more condition. One prefers that New Year’s day not be on a Sunday, to make sure that the seventh day of Tabernacles not be on the Sabbath, rather than New Year’s Day (and the first day of Tabernacles) not be on the Sabbath, since outside the Temple the shofar may still be blown on the Second Day of the New Year..

Rebbi Simon ordered those who computed²¹The calendar., be careful not to put the shofar blowing on the Sabbath nor the willow on the Sabbath. And if you are in trouble, put the shofar blowing on the Sabbath but do not put the willow on the Sabbath.