3:1-13 There was much work belonging to the priests' office, and there were now only Aaron and his two sons to do it; God appoints the Levites to attend them. Those whom God finds work for, he will find help for. The Levites were taken instead of the first-born. When He that made us, saves us, as the first-born of Israel were saved, we are laid under further obligations to serve him faithfully. God's right to us by redemption, confirms the right he has to us by creation.
And they shall keep all the instruments of the tabernacle of the congregation,.... Take care of them that none be lost or come to any damage, especially while it was moving, and carried from place to place; then the several parts of it, as well as the vessels in it, were committed to their care and charge, the particulars of which see in Numbers 3:25,
and the charge of the children of Israel, to do the service of the tabernacle; See Gill on Numbers 3:7.
and the charge of the children of Israel, to do the service of the tabernacle; See Gill on Numbers 3:7.