Deuteronomy 16:9-15

9Seven weeks shalt thou number to thee: begin to number the seven weeks from the time when thou beginnest to put the sickle to the grain.

10And thou shalt keep the feast of weeks to the LORD thy God with a tribute of a freewill offering of thy hand, which thou shalt give to the LORD thy God, according as the LORD thy God hath blessed thee:1

11And thou shalt rejoice before the LORD thy God, thou, and thy son, and thy daughter, and thy male, and female servant, and the Levite that is within thy gates, and the stranger, and the fatherless, and the widow, that are among you, in the place which the LORD thy God hath chosen to place his name there.

12And thou shalt remember that thou wast a slave in Egypt: and thou shalt observe and do these statutes.

13Thou shalt observe the feast of tabernacles seven days, after that thou hast gathered in thy grain and thy wine:2

14And thou shalt rejoice in thy feast, thou, and thy son, and thy daughter, and thy male servant, and thy female servant, and the Levite, the stranger, and the fatherless, and the widow, that are within thy gates.

15Seven days shalt thou keep a solemn feast to the LORD thy God in the place which the LORD shall choose: because the LORD thy God shall bless thee in all thy increase, and in all the works of thy hands, therefore thou shalt surely rejoice.