Numbers 18:3-5

Tree of Life Version

³ They 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. ⁴ They 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. ⁵ So you are to attend to the Sanctuary and the care of the altar, so no further wrath will fall on Bnei-Yisrael.