Numbers 3:40-41

ECB(i) 40 And Yah Veh says to Mosheh, Muster all the firstbirths of the males of the sons of Yisra El - sons of a month and upward; and bear the number of their names. 41 And take the Leviym for me - I - Yah Veh instead of all the firstbirths among the sons of Yisra El; and the animals of the Leviym instead of all the firstlings among the animals of the sons of Yisra El.