¹⁵ And it came to pass, when Pharaoh was stubborn about letting us go, that ^(A)the Lord killed all the firstborn in the land of Egypt, both the firstborn of man and the firstborn of beast. Therefore I sacrifice to the Lord all males that open the womb, but all the firstborn of my sons I redeem.’

¹¹ If it is an unclean animal which they do not offer as a sacrifice to the Lord, then he shall present the animal before the priest;