Numbers 18:19-21

¹⁹All the heave-offerings of the holy things, which the children of Israel offer unto Jehovah, have I given thee, and thy sons and thy daughters with thee, as a portion for ever: it is a covenant of salt for ever before Jehovah unto thee and to thy seed with thee.

²⁰And Jehovah said unto Aaron, Thou shalt have no inheritance in their land, neither shalt thou have any portion among them: I am thy portion and thine inheritance among the children of Israel.

²¹And unto the children of Levi, behold, I have given all the tithe in Israel for an inheritance, in return for their service which they serve, even the service of the tent of meeting.