Deuteronomy 16:13-15

13Thou shalt keep the feast of tabernacles seven days, after that thou hast gathered in from thy threshing-floor and from thy winepress:

14and thou shalt rejoice in thy feast, thou, and thy son, and thy daughter, and thy manservant, and thy maidservant, and the Levite, and the stranger, and the fatherless, and the widow, that are within thy gates.

15Seven days shalt thou keep a feast unto the LORD thy God in the place which the LORD shall choose: because the LORD thy God shall bless thee in all thine increase, and in all the work of thine hands, and thou shalt be altogether joyful.