TSK · Numbers 3:13

Sanctify unto me all the first-born, whatsoever openeth the womb among the children of Israel, both of man and of beast: it is mine.

and it came to pass, when Pharaoh would hardly let us go, that Jehovah slew all the first-born in the land of Egypt, both the first-born of man, and the first-born of beast: therefore I sacrifice to Jehovah all that openeth the womb, being males; but all the first-born of my sons I redeem.

All that openeth the womb is mine; and all thy cattle that is male, the firstlings of cow and sheep.

And thou shalt take the Levites for me (I am Jehovah) instead of all the first-born among the children of Israel; and the cattle of the Levites instead of all the firstlings among the cattle of the children of Israel:

And I, behold, I have taken your brethren the Levites from among the children of Israel: to you they are a gift, given unto Jehovah, to do the service of the tent of meeting.

while the Egyptians were burying all their first-born, whom Jehovah had smitten among them: upon their gods also Jehovah executed judgments.

(as it is written in the law of the Lord, Every male that openeth the womb shall be called holy to the Lord),