And everything that opens the womb of all flesh, whatsoever they bring to the Lord, whether man or beast, shall be yours: only the firstborn of men shall be surely redeemed, and you shall redeem the firstborn of unclean cattle.

Every [offspring] opening the womb of the donkey you shall change for a sheep; and if you will not change it, you shall redeem it. Every firstborn of man among your sons you shall redeem.