Deuteronomy 16:13-15

13“You shall celebrate the Feast of Booths (Tabernacles) seven days, when you have gathered in [the grain] from your threshing floor and [the wine] from your wine vat.

14You shall rejoice in your feast, you and your son and your daughter and your male and female servants and the Levite and the stranger and the orphan and the widow who are within your city.

15Seven days you shall celebrate a feast to the Lord your God in the place which the Lord chooses, because the Lord your God will bless you in all your produce and in all the work of your hands, so that you will be altogether joyful.