9. And you shall give the Levites [as servants and helpers] to Aaron and his sons; they are wholly given to him from among the Israelites.
10. And you shall appoint Aaron and his sons, and they shall observe and attend to their priest's office; but the excluded [anyone daring to assume priestly duties or privileges who is not of the house of Aaron and called of God] who comes near [the holy things] shall be put to death.
11. And the Lord said to Moses,
12. Behold, I have taken the Levites from among the Israelites instead of every firstborn who opens the womb among the Israelites; and the Levites shall be Mine,
13. For all the firstborn are Mine. On the day that I slew all the firstborn in the land of Egypt, I consecrated for Myself all the firstborn in Israel, both man and beast; Mine they shall be. I am the Lord.
14. And the Lord said to Moses in the Wilderness of Sinai,