Numbers 18:7; Numbers 18:20

7 "But you and your sons with you shall attend to your priesthood for everything concerning the altar and inside the veil, and you are to perform service. I am giving you the priesthood as a bestowed service, but the outsider who comes near shall be put to death."

20 Then the LORD said to Aaron, "You shall have no inheritance in their land nor own any portion among them; I am your portion and your inheritance among the sons of Israel.