“Consecrate to Me all the firstborn, whatever opens the womb among the children of Israel, both of man and beast; it is Mine.”

that you shall set apart to the Lord all that open the womb, that is, every firstborn that comes from an animal which you have; the males shall be the Lord’s.

And it came to pass, when Pharaoh was stubborn about letting us go, that the Lord killed all the firstborn in the land of Egypt, both the firstborn of man and the firstborn of beast. Therefore I sacrifice to the Lord all males that open the womb, but all the firstborn of my sons I redeem.’

“All that open the womb are Mine, and every male firstborn among your livestock, whether ox or sheep.