Numbers 18:19-21

¹⁹I have given to thee, and to thy sons and thy daughters, by everlasting right, all the first fruits of the saintuary, which the sons of Israel offer to the Lord; it is everlasting covenant of salt before the Lord, to thee, and to thy sons.

²⁰And the Lord said to Aaron, Ye shall not wield anything of heritage in the land of Israel, neither ye shall have part among them; I am thy part and thine heritage, in the midst of the sons of Israel.

²¹Soothly, I gave to the sons of Levi all the tithes of Israel into possession, for the service by which they serve me in the tabernacle of the bond of peace;