Numbers 8:15-17

Darby Translation

¹⁵ And afterwards shall the Levites come in to do the service of the tent of meeting. And thou shalt cleanse them, and offer them as a wave-offering.

¹⁶ For they are wholly given unto me from among the children of Israel; instead of every one that breaketh open the womb, instead of every firstborn among the children of Israel, have I taken them unto me.

¹⁷ For all the firstborn among the children of Israel are mine, both of man and beast; on the day that I smote every firstborn in the land of Egypt, I hallowed them to myself.