Cross reference
Numbers 3:12
12 `And I, lo, I have taken the Levites from the midst of the sons of Israel instead of every first-born opening a womb among the sons of Israel, and the Levites have been Mine;
Numbers 3:41
41 and thou hast taken the Levites for Me (I `am' Jehovah), instead of every first-born among the sons of Israel, and the cattle of the Levites instead of every firstling among the cattle of the sons of Israel.'
Numbers 8:16
16 `For they are certainly given to Me out of the midst of the sons of Israel, instead of him who openeth any womb -- the first-born of all -- from the sons of Israel I have taken them to Myself;
Numbers 3:45
45 `Take the Levites instead of every first-born among the sons of Israel, and the cattle of the Levites instead of their cattle; and the Levites have been Mine; I `am' Jehovah.
Numbers 8:18
18 and I take the Levites instead of every first-born among the sons of Israel:
Numbers 18:6
6 `And I, lo, I have taken your brethren the Levites from the midst of the sons of Israel; to you a gift they are given by Jehovah, to do the service of the tent of meeting;
Exodus 13:2
2 `Sanctify to Me every first-born, opening any womb among the sons of Israel, among man and among beast; it `is' Mine.'