Numbers 3:7-9

Revised Standard Version Catholic Edition

⁷ They shall perform duties for him and for the whole congregation before the tent of meeting, as they minister at the tabernacle; ⁸ they shall have charge of all the furnishings of the tent of meeting, and attend to the duties for the people of Israel as they minister at the tabernacle. ⁹ And you shall give the Levites to Aaron and his sons; they are wholly given to him from among the people of Israel.