Exodus 13:15

English Standard Version

15 For when Pharaoh stubbornly refused to let us go, the Lord killed all the firstborn in the land of Egypt, both the firstborn of man and the firstborn of animals. Therefore I sacrifice to the Lord all the males that first open the womb, but all the firstborn of my sons I redeem.’ (Ex12:29; Ex13:13)

New International Version

15 When Pharaoh stubbornly refused to let us go, the Lord killed the firstborn of both people and animals in Egypt. This is why I sacrifice to the Lord the first male offspring of every womb and redeem each of my firstborn sons.’

New Int. Readers Version

15 Pharaoh was stubborn. He refused to let us go. So the Lord killed every oldest son in Egypt. He also killed every male animal that was born first to its mother. That's why I sacrifice to the Lord every male animal that was born first. And that's why I buy back each oldest son for him.’

King James Version

15 And 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.