“You shall perform the duty of the sanctuary and the duty of the altar, that there be no more wrath on the children of Israel.”
Numbers 18:5 (WEB)
Context Reading
3They shall keep your commands and the duty of the whole Tent; only they shall not come near to the vessels of the sanctuary and to the altar, that they not die, neither they nor you. 4They shall be joined to you and keep the responsibility of the Tent of Meeting, for all the service of the Tent. A stranger shall not come near to you. 5“You shall perform the duty of the sanctuary and the duty of the altar, that there be no more wrath on the children of Israel. 6Behold, I myself have taken your brothers the Levites from among the children of Israel. They are a gift to you, dedicated to Yahweh, to do the service of the Tent of Meeting. 7You and your sons with you shall keep your priesthood for everything of the altar, and for that within the veil. You shall serve. I give you the service of the priesthood as a gift. The stranger who comes near shall be put to death.”