And יהוה said to Mosheh, “Now see what I do to Pharaoh, for with a strong hand he is going to let them go, and with a strong hand he is going to drive them out of his land.”
And יהוה said to Mosheh, “As you go back to Mitsrayim, see that you do all those wonders before Pharaoh which I have put in your hand. But I am going to harden his heart, so that he does not let the people go.
‘And it came to be, when Pharaoh was too hardened to let us go, that יהוה killed every first-born in the land of Mitsrayim, both the first-born of man and the first-born of beast. Therefore I am slaughtering to יהוה every male that open the womb, but every first-born of my sons I ransom.’