Deuteronomy 16:14-17

Leeser(i) 14 And thou shalt rejoice on 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 solemn feast unto the Lord thy God in the place which the Lord will choose; because the Lord thy God will bless thee in all thy product, and in all the work of thy hands, and thou shalt only rejoice. 16 Three times in the year shall every one of thy males appear before the Lord thy God in the place which he will choose: on the feast of unleavened bread, and on the feast of weeks, and on the feast of tabernacles; and no one shall appear before the Lord empty; 17 Every man according to what his hand can give, according to the blessing of the Lord thy God which he hath given thee.