Moses and Aaron did all these wonders before Pharaoh; and the Lord hardened Pharaoh's heart, and he did not let the people of Israel go out of his land.
And the Lord said to Moses, “When you go back to Egypt, see that you do before Pharaoh all the miracles which I have put in your power; but I will harden his heart, so that he will not let the people go.
O Lord, why dost thou make us err from thy ways and harden our heart, so that we fear thee not? Return for the sake of thy servants, the tribes of thy heritage.
“He has blinded their eyes and hardened their heart, lest they should see with their eyes and perceive with their heart, and turn for me to heal them.”
But Sihon the king of Heshbon would not let us pass by him; for the Lord your God hardened his spirit and made his heart obstinate, that he might give him into your hand, as at this day.
For it was the Lord's doing to harden their hearts that they should come against Israel in battle, in order that they should be utterly destroyed, and should receive no mercy but be exterminated, as the Lord commanded Moses.
Why should you harden your hearts as the Egyptians and Pharaoh hardened their hearts? After he had made sport of them, did not they let the people go, and they departed?