Numbers 3:6-8

New Revised Standard Version, Anglicised

⁶ Bring the tribe of Levi near, and set them before Aaron the priest, so that they may assist him. ⁷ They shall perform duties for him and for the whole congregation in front of the tent of meeting, doing service at the tabernacle; ⁸ they shall be in charge of all the furnishings of the tent of meeting, and attend to the duties for the Israelites as they do service at the tabernacle.