Deuteronomy 14:27-29

27And thou shalt not forsake the Levite that is within thy gates; for he hath no portion nor inheritance with thee. 28At the end of three years thou shalt bring forth all the tithe of thine increase the same year, and shalt lay it up within thy gates; 29and the Levite — for he hath no portion nor inheritance with thee — and the stranger, and the fatherless, and the widow, that are within thy gates, shall come, and shall eat and be satisfied; that Jehovah thy 1God may bless thee in all the work of thy hand which thou doest.