Why should you harden your hearts as the Egyptians and Pharaoh hardened their hearts? After he had made fools of them, did they not let the people go, and they departed?
So Moses and Aaron went to Pharaoh and said to him, “Thus says the Lord, the God of the Hebrews: How long will you refuse to humble yourself before me? Let my people go, so that they may serve me.
Then I will harden the hearts of the Egyptians so that they will go in after them, and so I will gain glory for myself over Pharaoh and all his army, his chariots, and his chariot drivers.
And the Lord said to Moses, “When you go back to Egypt, see that you perform before Pharaoh all the wonders that I have put in your power, but I will harden his heart, so that he will not let the people go.