Numbers 3:9-12

Living Bible

^7-9 They will follow his instructions and perform the sacred duties at the Tabernacle on behalf of all the people of Israel. For they are assigned to him as representatives of all the people of Israel. They are in charge of all the furnishings and maintenance of the Tabernacle. ¹⁰ However, only Aaron and his sons may carry out the duties of the priesthood; anyone else who presumes to assume this office shall be executed.”

^11-12 And the Lord said to Moses, “I have accepted the Levites in substitution for all the oldest sons of the people of Israel. The Levites are mine