Exodus 13 15
Pharaoh stubbornly refused to let us leave, so the Lord killed every firstborn in the land of Egypt, both human and animal. That's the reason why I sacrifice to the Lord the firstborn male of every animal, and I buy back all the firstborn of my sons.’
Compare with other 3 random translations
ERV Exodus 13:15In Egypt, Pharaoh was stubborn and refused to let us leave. So the Lord killed every firstborn in all the land. (The Lord killed the firstborn males—animal and human.) That is why I give every firstborn male animal to the Lord, and that is why I buy back each of my firstborn sons from him.’
GW Exodus 13:15When Pharaoh was too stubborn to let us go, the Lord killed every firstborn male in Egypt—human and animal. This is why we sacrifice every firstborn male to the Lord and buy every firstborn son back from the Lord.’
KJV Exodus 13:15and it came to pass, when Pharaoh would hardly let us go, that the Lord slew 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 that openeth the matrix, being males; but all the firstborn of my children I redeem.