Deuteronomy 14:28-29

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, (because he hath no part nor inheritance with thee,) and the stranger, and the fatherless, and the widow, which are within thy gates, shall come, and shall eat and be satisfied; that Yhwh thy God may bless thee in all the work of thine hand which thou doest.