The Lord said to Moses:
But you will appoint only Aaron and his descendants to exercise the priesthood. Any unauthorized person who comes near shall be put to death.
I hereby take the Levites from the Israelites in place of every firstborn that opens the womb among the Israelites. The Levites, therefore, are mine,
You should know that I sent you this commandment so that my covenant with Levi might endure, says the Lord of hosts.