Tomorrow is the last day of supplication. The seventh day of Sukkot (Tishri 21) is called "Hochaana Rabba". This is the day on which the divine judgment begun on "Rosh Hashanah" is finally decided. It is therefore marked by special prayers of supplication in which we implore God to judge us favorably (Exodus 23:16; 34:22; Leviticus 23:34-43; Numbers 29:12-34; Deuteronomy 16:13-16; 30:10-13).
Book of Exodus 23, 16
Ex 23, 16 : Thou shalt observe the Feast of Harvest, of the first-fruits of thy labor, of that which thou sowest in the field; and the Feast of Ingathering, at the end of the year, when thou gatherest in the field the fruit of thy labor.
Book of Exodus 34, 22
Ex 34, 22 : You shall celebrate the Feast of Weeks, of the first fruits of the wheat harvest, and the Feast of Ingathering at the end of the year.
Book of Numbers 29, 12-34:
On the fifteenth day, in the seventh month, you shall have a holy assembly: you shall do no servile work. And you shall keep a feast to Yahweh for seven days. You shall offer a burnt offering, an offering made by fire, of a sweet savor to Yahweh: thirteen young bulls, two rams and fourteen lambs of the first year without blemish, and for their meat offering, fine flour mingled with oil: three tenths for each of the thirteen bulls, two tenths for each of the two rams, and one tenth for each of the fourteen lambs. You shall also offer a he-goat as a sin offering, without prejudice to the continual burnt offering with its oblation and libation.
On the second day, you shall offer twelve young bulls, two rams and fourteen lambs of the first year without blemish, with their meat offerings and their drink offerings, for the bulls, the rams and the lambs, according to their number, according to the rule. You shall also offer a goat for a sin offering, without prejudice to the continual burnt offering, its meat offering and their drink offerings.
On the third day you shall offer eleven bulls, two rams and fourteen lambs of the first year without blemish, with their meat offerings and their drink offerings, for the bulls, the rams and the lambs, according to their number, according to the ordinance. You shall also offer a goat for a sin offering, without prejudice to the continual burnt offering, its meat offering and its drink offering.
On the fourth day, you shall offer ten bulls, two rams and fourteen lambs of the first year without blemish, with their meat offerings and their drink offerings, for the bulls, rams and lambs, according to their number according to the rule. You shall also offer a he-goat for a sin offering, without prejudice to the continual burnt offering, its meat offering and its drink offering.
On the fifth day, you shall offer nine bulls, two rams and fourteen lambs of the first year without blemish, with their meat offerings and their drink offerings, for the bulls, rams and lambs, according to their number, according to the ordinance. You shall also offer a goat for a sin offering, without prejudice to the continual burnt offering, its meat offering and its drink offering.
On the sixth day, you shall offer eight bulls, two rams and fourteen lambs of the first year without blemish, with their meat offerings and their drink offerings, for the bulls, rams and lambs, according to their number, according to the ordinance. You shall also offer a he-goat for a sin offering, without prejudice to the continual burnt offering, its meat offering and its drink offering.
On the seventh day you shall offer seven bulls, two rams and fourteen lambs of the first year without blemish, 33with their meat offerings and their drink offerings, for the bulls, the rams and the lambs, according to their number, according to the ordinance. 34You shall also offer a he-goat for a sin offering, without prejudice to the continual burnt offering, its meat offering and its drink offering.
Book of Deuteronomy 16, 13-16
Dt 16, 13-16 : You shall keep the Feast of Tabernacles for seven days, when you have gathered in your threshing floor and your winepress; 14you shall rejoice at this feast, you, your son and your daughter, your man-servant and your maid-servant, as well as the Levite, the stranger, the orphan and the widow who are within your gates. You shall keep the feast seven days in honor of Yahweh your God, in the place which Yahweh has chosen; for Yahweh your God will bless you in all your crops and in all the work of your hands, and you will be full of joy. Three times a year, every male among you shall appear before Yahweh, your God, in the place he has chosen: at the Feast of Unleavened Bread, at the Feast of Weeks and at the Feast of Tabernacles; he shall not appear before Yahweh empty-handed.
Book of Deuteronomy, 30, 10-13
Dt 30, 10-13 : if you obey the voice of Yahweh, your God, by keeping his commandments and precepts written in this book of the law, if you return to Yahweh, your God, with all your heart and with all your soul. This commandment that I am commanding you today is not above you or beyond your reach. It is not in heaven, for you to say, "Who will go up to heaven for us and fetch it for us, and make us hear it, so that we may fulfill it?" It is not beyond the sea, so that you say, "Who will pass for us beyond the sea and fetch it for us, and make us hear it, that we may fulfill it?"