Numbers 18:4-7 and they join you and guard the guard of the tent of the congregation, for all the service of the tent so that no stranger approaches you:

ECB⁽ⁱ⁾ ⁴ and they join you and guard the guard of the tent of the congregation, for all the service of the tent so that no stranger approaches you: ⁵ and guard the guard of the holies and the guard of the sacrifice altar so that there be no more rage on the sons of Yisra El. ⁶ And I - behold, I take your brothers the Leviym from among the sons of Yisra El: and give them to you, a gift for Yah Veh, to serve the service of the tent of the congregation. ⁷ And you, with your sons, guard your priesthood for every word of the sacrifice altar and the housing of the veil - and you serve: I give you priesthood, a service of gift: and deathify the stranger who approaches.