Numbers 3:7-9

Darby Translation

⁷ and they shall keep his charge, and the charge of the whole assembly, before the tent of meeting, to do the service of the tabernacle.

⁸ And they shall keep all the utensils of the tent of meeting, and the charge of the children of Israel, to do the service of the tabernacle.

⁹ And thou shalt give the Levites to Aaron and to his sons: they are wholly given to him out of the children of Israel.