Exodus 13:11-13 Modern English Version (MEV)
The Law of the Firstborn
11 “It shall be when the Lord brings you into the land of the Canaanites, just as He swore to you and to your fathers, and shall give it you, 12 that you shall set apart to the Lord the first offspring of every womb and the first offspring of every beast which you have. The males shall be the Lord’s. 13 But every first offspring of a donkey you shall redeem with a lamb. And if you do not redeem it, then you shall break its neck, and all the firstborn of man among your sons you shall redeem.