Exodus 13:12

that thou shalt set apart every [offspring] opening the womb, the males to the Lord, every one that opens the womb out of the herds or among thy cattle, as many as thou shalt have: thou shalt sanctify the males 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.

that you shall set apart to Yahweh all that opens the womb, and every firstborn that comes from an animal which you have. The males shall be Yahweh’s.