“You are to take the Levites in place of all the firstborn children of Israel, and the livestock of the Levites in place of their livestock, because the Levites belong to me. I am the Lord.
You can redeem the firstborn of a donkey with a lamb, but if you don't, you must break its neck. All your firstborn sons must be redeemed. No one is to come before me without an offering.
Look, I myself have chosen your brothers the Levites from the Israelites as my gift to you, dedicated to the Lord to do the work that relates to the Tent of Meeting.
The Levites have been completely given over to me by the Israelites. I have accepted them as mine in place of all the firstborn sons of the Israelites.