Deuteronomy 16:13

“Thou shalt observe the feast of tabernacles seven days, etc.] Which began on the fifteenth day of Tisri, or September; (see <032334>Leviticus 23:34), etc. after that thou hast gathered in thy corn and thy wine; and therefore sometimes called the feast of ingathering, (<022316>Exodus 23:16), barley harvest began at the passover, and wheat harvest at Pentecost; and before the feast of tabernacles began, the vintage and the gathering of the olives were over, as well as all other summer fruits were got in.”

“Thou shalt observe the feast of tabernacles seven days--(See on Exo 23:14; Lev 23:34; Num 29:12). Various conjectures have been formed to account for the appointment of this feast at the conclusion of the whole harvest. Some imagine that it was designed to remind the Israelites of the time when they had no cornfields to reap but were daily supplied with manna; others think that it suited the convenience of the people better than any other period of the year for dwelling in booths; others that it was the time of Moses' second descent from the mount; while a fourth class are of opinion that this feast was fixed to the time of the year when the Word was made flesh and dwelt--literally,…”

“16:13-17 The Festival of Shelters is called this because the people of Israel were instructed to camp out for a week in crude huts made of tree limbs as a memorial to their years of wilderness wandering (Lev 23:33-43). It was also a celebration of the fall harvests.”

“the feast: Deu 31:10; Exo 23:16, Exo 34:22; Lev 23:34-36; Num. 29:12-40; Ch2 5:3, Ch2 7:8-10; Ch2 8:13; Ezr 3:4; Neh 8:14-18; Zac 14:16-18; Joh 7:2 corn and thy wine: Heb. floor and thine wine-press Deuteronomy 16:14”