Numbers 3:8

⁶Take the tribe of Levi, and thou shalt set them before Aaron the priest, and they shall minister to him,

⁷and shall keep his charges, and the charges of the children of Israel, before the tabernacle of witness, to do the works of the tabernacle.

— Numbers 3:8 —

⁹And thou shalt give the Levites to Aaron, and to his sons the priests; they are given for a gift to me of the children of Israel.

¹⁰And thou shalt appoint Aaron and his sons over the tabernacle of witness; and they shall keep their charge of priesthood, and all things belonging to the altar, and within the veil; and the stranger that touches them shall die.