Deuteronomy 12:17-19

17Thou mayest not eat within thy gates the tithe of thy grain, or of thy wine, or of thy oil, or the firstlings of thy herds or of thy flock, nor any of thy vows which thou vowest, nor thy freewill offerings, or heave offering of thy hand: 18But thou must eat them before the LORD thy God in the place which the LORD thy God shall choose, thou, and thy son, and thy daughter, and thy male servant, and thy female servant, and the Levite that is within thy gates: and thou shalt rejoice before the LORD thy God in all that thou puttest thine hands to. 19Take heed to thyself that thou forsake not the Levite as long as thou livest upon the earth.1