Numbers 18:20-23

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

21And to the children of Levi, behold, I have given all the tithes in Israel for an inheritance, for their service which they perform, the service of the tent of meeting.

22Neither shall the children of Israel henceforth come near the tent of meeting, to bear sin and die.

23But the Levite, he shall perform the service of the tent of meeting, and they shall bear their iniquity: it is an everlasting statute throughout your generations. And among the children of Israel shall they possess no inheritance;