Numbers 18:3-5  New English Translation

³ They must be responsible to care for you and to care for the entire tabernacle. However, they must not come near the furnishings of the sanctuary and the altar, or both they and you will die. ⁴ They must join^[a] with you, and they will be responsible for the care of the tent of meeting, for all the service of the tent, but no unauthorized person^[b] may approach you. ⁵ You will be responsible for the care of the sanctuary and the care of the altar, so that there will be^[c] no more wrath on the Israelites.