Exodus 9:34
But when Pharaoh saw that the rain and the hail and the thunder had ceased, he sinned again and hardened his heart, both he and his servants.
Exodus 7:14
Then the Lord said to Moses, “Pharaoh’s heart is hard; he refuses to let the people go.
Exodus 4:21
The Lord said to Moses, “When you return to Egypt, see that you perform before Pharaoh all the wonders (miracles) which I have put in your hand, but I will harden his heart and make him stubborn so that he will not let the people go.
Exodus 8:15
But when Pharaoh saw that there was [temporary] relief, he hardened his heart and would not listen or pay attention to them, just as the Lord had said.
2 Chronicles 28:22
In the time of his distress, this same King Ahaz became yet more unfaithful to the Lord.
2 Chronicles 33:23
Further, he did not humble himself before the Lord as his father Manasseh [finally] had done, but Amon multiplied his guilt and his sin.
2 Chronicles 36:13
He also rebelled against King Nebuchadnezzar who had made him swear allegiance by God. He stiffened his neck and hardened his heart against turning to the Lord God of Israel.
Ecclesiastes 8:11
Because the sentence against an evil act is not executed quickly, the hearts of the sons of men are fully set to do evil.
Romans 2:4-5
Or do you have no regard for the wealth of His kindness and tolerance and patience [in withholding His wrath]? Are you [actually] unaware or ignorant [of the fact] that God’s kindness leads you to repentance [that is, to change your inner self, your old way of thinking—seek His purpose for your life]?