Leviticus 23:34

23:34 “Tell the Israelites, ‘On the fifteenth day of this seventh month is the Festival of Temporary Shelters for seven days to the Lord.

Exodus 23:16

23:16 “You are also to observe the Feast of Harvest, the firstfruits of your labors that you have sown in the field, and the Feast of Ingathering at the end of the year when you have gathered in your harvest out of the field.

Deuteronomy 16:13

The Festival of Temporary Shelters

16:13 You must celebrate the Festival of Temporary Shelters for seven days, at the time of the grain and grape harvest.