Exodus 23:16, 17
You are also to observe the Feast of Harvest with the firstfruits of the produce from what you sow in the field. And observe the Feast of Ingathering at the end of the year, when you gather your produce from the field. . . .

Leviticus 23:34-43
"Speak to the Israelites and say, 'On the fifteenth day of the seventh month the Feast of Tabernacles to the LORD begins, and it continues for seven days. . . .

Numbers 29:12-38
On the fifteenth day of the seventh month, you are to hold a sacred assembly; you must not do any regular work, and you shall observe a feast for the LORD for seven days. . . .

Deuteronomy 16:13-16
You are to celebrate the Feast of Tabernacles for seven days after you have gathered the produce of your threshing floor and your winepress. . . .

1 Kings 8:2, 65
And all the men of Israel came together to King Solomon at the feast in the seventh month, the month of Ethanim. . . .

2 Chronicles 7:9, 10
On the eighth day they held a solemn assembly, for the dedication of the altar had lasted seven days, and the feast seven days more. . . .

Ezra 3:4
They also celebrated the Feast of Tabernacles, as it is written, and offered burnt offerings daily, based on the number prescribed for each day.

Nehemiah 8:14-18
And they found written in the Law, which the LORD had commanded through Moses, that the Israelites were to dwell in booths during the feast of the seventh month. . . .

Zechariah 14:16-19
Then all the survivors from the nations that came against Jerusalem will go up year after year to worship the King, the LORD of Hosts, and to celebrate the Feast of Tabernacles. . . .