Exodus 13:1
And the LORD spake unto Moses, saying,
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Exodus 13:2
Sanctify unto me all the firstborn, whatsoever openeth the womb among the children of Israel, both of man and of beast: it is mine.
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Exodus 12:37
And the children of Israel journeyed from Rameses to Succoth, about six hundred thousand on foot that were men, beside children.
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Exodus 6:10
And the LORD spake unto Moses, saying,
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Numbers 3:13
Because all the firstborn are mine; for on the day that I smote all the firstborn in the land of Egypt I hallowed unto me all the firstborn in Israel, both man and beast: mine shall they be: I am the LORD.
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