Numbers 3:12, 41, 45

“See, I have taken the Levites from the Israelites in place of every firstborn Israelite from the womb.  The Levites belong to me

You are to take the Levites for me — I am the LORD  — in place of every firstborn among the Israelites, and the Levites’ cattle in place of every firstborn among the Israelites’ cattle.”

“Take the Levites in place of every firstborn among the Israelites, and the Levites’ cattle in place of their cattle. The Levites belong to me; I am the LORD.