Numbers 3:12

12 “I have taken the Levites from among the Israelites in place of the first male offspring of every Israelite woman. The Levites are mine,

Read Numbers 3:12 Using Other Translations

And I, behold, I have taken the Levites from among the children of Israel instead of all the firstborn that openeth the matrix among the children of Israel: therefore the Levites shall be mine;
"Behold, I have taken the Levites from among the people of Israel instead of every firstborn who opens the womb among the people of Israel. The Levites shall be mine,
“Look, I have chosen the Levites from among the Israelites to serve as substitutes for all the firstborn sons of the people of Israel. The Levites belong to me,