Exodus 13:12

you shall set apart to the Lord all that first opens the womb . All the firstborn of your animals that are males shall be the Lord ’s .

you are to give over to the Lord the first offspring of every womb. All the firstborn males of your livestock belong to the Lord.

That thou shalt set apart unto the Lord all that openeth the matrix, and every firstling that cometh of a beast which thou hast; the males shall be the Lord's.