12you are to present to the LORD the firstborn male of every womb. All the firstborn males of your livestock belong to the LORD.
13You must redeem every firstborn donkey with a lamb, and if you do not redeem it, you are to break its neck. And every firstborn of your sons you must redeem.
14In the future, when your son asks you, ‘What does this mean?’ you are to tell him, ‘With a mighty hand the LORD brought us out of Egypt, out of the house of slavery.
15And when Pharaoh stubbornly refused to let us go, the LORD killed every firstborn in the land of Egypt, both of man and beast. This is why I sacrifice to the LORD the firstborn male of every womb, but I redeem all the firstborn of my sons.’
— Exodus 13:12-15