Num Numbers, chapter Book of Numbers, chapter 18
Duties of Levites
But you and your sons with you shall attend to your priesthood for everything that concerns the altar and inside the veil, and you are to perform service. I am giving you the priesthood as a 18:7 Lit service of a giftservice that is a gift, and the 18:7 Lit strangerunauthorized person who comes near shall be put to death.”Num 3:10; Num 16:40