Numbers 3:9-16
English Standard Version
Chapter 3
9And you shall give the Levites to Aaron and his sons; they are wholly given to him from among the people of Israel. 10And you shall appoint Aaron and his sons, and they shall guard their priesthood. But if any outsider comes near, he shall be put to death."
11And the Lord spoke to Moses, saying,
12"Behold, I have taken the Levites from among the people of Israel instead of every firstborn who opens the womb among the people of Israel. The Levites shall be mine,
13for all the firstborn are mine. On the day that I struck down all the firstborn in the land of Egypt, I consecrated for my own all the firstborn in Israel, both of man and of beast. They shall be mine: I am the Lord."
