Numbers 8:16-18

New International Version

¹⁶ They are the Israelites who are to be given wholly to me. I have taken them as my own in place of the firstborn,^(A) the first male offspring^(B) from every Israelite woman. ¹⁷ Every firstborn male in Israel, whether human or animal,^(C) is mine. When I struck down all the firstborn in Egypt, I set them apart for myself.^{(D) 18} And I have taken the Levites in place of all the firstborn sons in Israel.^(E)