TSK · Numbers 3:13

"Sanctify to me all of the firstborn, whatever opens the womb among the children of Israel, both of man and of animal. It is mine."

and it happened, when Pharaoh would hardly let us go, that Yahweh killed all the firstborn in the land of Egypt, both the firstborn of man, and the firstborn of animal. Therefore I sacrifice to Yahweh all that opens the womb, being males; but all the firstborn of my sons I redeem.'

"All that opens the womb is mine; and all your livestock that is male, the firstborn of cow and sheep.

You shall take the Levites for me (I am Yahweh) instead of all the firstborn among the children of Israel; and the livestock of the Levites instead of all the firstborn among the livestock of the children of Israel."

I, behold, I have taken your brothers the Levites from among the children of Israel: to you they are a gift, given to Yahweh, to do the service of the Tent of Meeting.

while the Egyptians were burying all their firstborn, whom Yahweh had struck among them: on their gods also Yahweh executed judgments.

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