And the Lord said to Moses, “When you go back to Egypt, see that you do before Pharaoh all the miracles that I have put in your power. But I will harden his heart, so that he will not let the people go.
But because of your hard and impenitent heart you are storing up wrath for yourself on the day of wrath when God’s righteous judgment will be revealed.
O Lord, why do you make us wander from your ways and harden our heart, so that we fear you not? Return for the sake of your servants, the tribes of your heritage.
Then Pharaoh called Moses and Aaron and said, “Plead with the Lord to take away the frogs from me and from my people, and I will let the people go to sacrifice to the Lord.”
Why should you harden your hearts as the Egyptians and Pharaoh hardened their hearts? After he had dealt severely with them, did they not send the people away, and they departed?