Numbers 18:6-7; Numbers 18:23

Numbers 18:6-7

6 I myself have taken your kinsmen the L'vi'im from among the people of Isra'el; they have been given as a gift to ADONAI for you, so that you can perform the service in the tent of meeting.

7 You and your sons with you will exercise your prerogatives and duties as cohanim in regard to everything having to do with the altar and within the curtain. I entrust the service required of cohanim to you; the unauthorized person who tries to perform it is to be put to death."

Numbers 18:23

23 Only the L'vi'im are to perform the service in the tent of meeting, and they will be responsible for whatever they do wrong. This is to be a permanent regulation through all your generations. They are to have no inheritance among the people of Isra'el,