Every firstborn of a donkey you shall redeem by [substituting for it] a lamb, or if you will not redeem it, then you shall break its neck; and every firstborn among your sons shall you redeem.
For when Pharaoh stubbornly refused to let us go, the Lord slew all the firstborn in the land of Egypt, both the firstborn of man and of livestock. Therefore I sacrifice to the Lord all the males that first open the womb; but all the firstborn of my sons I redeem.