Numbers 18:3-5

New Life Version

³ They will help you and help in doing all the work of the tent. But they must not come near the objects of the meeting tent and the altar, or both they and you will die. ⁴ They will join you and help do all the work of the meeting tent. But no one else may come near you. ⁵ You must do the work of the meeting tent and the work of the altar, so there will no longer be anger on the people of Israel.