Deuteronomy 16:10-13

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