Exodus 9:34
And when Pharaoh saw that the rain and the hail and the thunders had ceased, he sinned still more and hardened his heart, he and his servants.
Exodus 7:14
And Jehovah said to Moses, Pharaoh's heart is hardened. He refuses to let the people go.
Exodus 4:21
And Jehovah said to Moses, When you go to return into Egypt, see that you do all those wonders which I have put in your hand before Pharaoh; but I will harden his heart, that he shall not let the people go.
Exodus 8:15
But Pharaoh saw that there was relief, and he hardened his heart, and did not listen to them, even as Jehovah had said.
2 Chronicles 28:22
And in the time of his distress he trespassed even more against Jehovah, this King Ahaz.
2 Chronicles 33:23
And he did not bow before Jehovah, like the humbling of his father Manasseh. For Amon himself multiplied guilt.
2 Chronicles 36:13
And he also rebelled against King Nebuchadnezzar, who had made him swear by God. But he stiffened his neck and hardened his heart from turning to Jehovah, the God of Israel.
Ecclesiastes 8:11
Because sentence against an evil work is not executed speedily, therefore the heart of the sons of men is fully set in them to do evil.
Romans 2:4-5
Or do you despise the riches of His kindness, and the forbearance and long-suffering, not knowing that the kindness of God leads you to repentance?