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 the LORD said unto 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 the LORD hardened the heart of Pharaoh, and he hearkened not unto them; as the LORD had spoken unto Moses.
Job 9:4
He is wise in heart, and mighty in strength: who has hardened himself against him, and has prospered?
Proverbs 29:1
He, that being often reproved hardens his neck, shall suddenly be destroyed, and that without remedy.
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 deposed from his kingly throne, and they took his glory from him:
Romans 9:18
Therefore has he mercy on whom he will have mercy, and whom he will he hardens.