Numbers 8:16-18 GOD’S WORD Translation (GW)
16 They will be the only Israelites given to me. I have taken them to be mine as substitutes for every firstborn male offspring of the Israelites. 17 Every firstborn in Israel, whether human or animal, is mine. The day I killed every firstborn male in Egypt, I set them apart as holy to me. 18 So I have taken the Levites as substitutes for all the firstborn sons of the Israelites.