Numbers 3:45

Take the Levites, instead of all the firstborn among the sons of Israel, and the cattle of the Levites, instead of their cattle, - so shall the Levites belong unto me, me Yahweh;

Numbers 3:12

I, therefore, lo! I have taken the Levites out of the midst of the sons of Israel, instead of every firstborn that a mother beareth, from among the sons of Israel, - so shall the Levites be mine;

Numbers 3:40-41

And Yahweh said unto Moses: Number thou every firstborn male belonging to the sons of Israel, from one month old and upwards, - and reckon up the number of their names;

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