Exodus 9:7
And Pharaoh sent, and, behold, there was not one of the cattle of the Israelites dead. And the heart of Pharaoh was hardened, and he did not let the people go.
Exodus 7:14
And Jehovah said to Moses, Pharaoh's heart is hardened. He refuses to let the people go.
Exodus 8:32
And Pharaoh hardened his heart at this time also, neither would he let the people go.
Exodus 9:12
And Jehovah hardened the heart of Pharaoh, and he did not listen to them, even as Jehovah had spoken to Moses.
Job 9:4
He is wise in heart, and mighty in strength. Who has hardened himself against Him and been blessed;
Proverbs 29:1
A man who hardens his neck when reproved shall be suddenly broken, and there will be no healing.
Isaiah 48:4
Because I knew that you are obstinate, and your neck is an iron sinew and your brow bronze.
Daniel 5:20
But when his heart was lifted up, and his mind hardened in pride, he was put down from the throne of his kingdom, and they took his glory from him.
Romans 9:18
Therefore He has mercy on whom He will have mercy, and whom He will, He hardens.