Deuteronomy 16:14-17

JPS_ASV_Byz(i) 14 And thou shalt rejoice in thy feast, thou, and thy son, and thy daughter, and thy man-servant, and thy maid-servant, and the Levite, and the stranger, and the fatherless, and the widow, that are within thy gates. 15 Seven 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 thy hands, and thou shalt be altogether joyful. 16 Three times in a year shall all thy males appear before the LORD thy God in the place which He shall choose; on the feast of unleavened bread, and on the feast of weeks, and on the feast of tabernacles; and they shall not appear before the LORD empty; 17 every man shall give as he is able, according to the blessing of the LORD thy God which He hath given thee.