Numbers 18:5; Numbers 18:7; Numbers 18:8

5 "So you shall attend to the obligations of the sanctuary and the obligations of the altar, so that there will no longer be wrath on the sons of Israel.

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."

8 Then the LORD spoke to Aaron, "Now behold, I Myself have given you charge of My offerings, even all the holy gifts of the sons of Israel I have given them to you as a portion and to your sons as a perpetual allotment.