Exodus 13:12-15 ▼

12 and you shall devote to Yahweh the first offspring of every womb and the first offspring of every beast that you own; the males belong to Yahweh.

13 But every first offspring of a donkey you shall redeem with a lamb, but if you do not redeem it, then you shall break its neck; and every firstborn of man among your sons you shall redeem.

14 And it will be when your son asks you in time to come, saying, ‘What is this?’ then you shall say to him, ‘With a strong hand Yahweh brought us out of Egypt, from the house of slavery.

15 And it happened, when Pharaoh hardened his heart with stiffness about letting us go, that Yahweh killed every firstborn in the land of Egypt, both the firstborn of man and the firstborn of beast. Therefore, I sacrifice to Yahweh the males, the first offspring of every womb, but every firstborn of my sons I redeem.’