Numbers 18:5 in the King James Version
And ye shall keep the charge of the sanctuary, and the charge of the altar: that there be no wrath any more upon the children of Israel.
Context
4 They 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.
6 Behold, I myself have taken your brothers the Levites from among the children of Israel. They are a gift to you, dedicated to the LORD, to do the service of the Tent of Meeting.