Numbers 18:1-7

1Adonai said to Aaron, “You, your sons, and the house of your father with you will bear the guilt for the Sanctuary, and you and your sons will bear the guilt for your priesthood.

2Bring with you your brothers, the tribe of Levi, the tribe of your father, so that they may join you and assist you, both you and your sons with you, before the Tent of the Testimony.

3They are to perform their duties for you and for all matters related to the Tent. They must not approach the implements of the Sanctuary or the altar—otherwise, both you and they will die.

4They are to team with you and attend to the Tent of Meeting, for all the service of the Tent. But no unauthorized person may intrude upon you.

5So you are to attend to the Sanctuary and the care of the altar, so no further wrath will fall on Bnei-Yisrael.

6“See, I have personally taken your kinsmen, the Levites, from among Bnei-Yisrael as a gift for you and your sons with you, dedicated to Adonai to serve in the work of the Tent of Meeting.

7But you and your sons with you are to maintain your priesthood for everything pertaining to the altar and inside the parokhet . I am giving you the ministry of the priesthood as a gift. Anyone unauthorized who approaches will die.”