Numbers 3:7-9

King James Version

⁷ And they shall keep his charge, and the charge of the whole congregation before the tabernacle of the congregation, to do the service of the tabernacle.

⁸ And they shall keep all the instruments of the tabernacle of the congregation, and the charge of the children of Israel, to do the service of the tabernacle.

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