Exodus 9:7
And Pharaoh sent, and, behold, there was not so much as one of the cattle of the Israelites dead. But the heart of Pharaoh was stubborn, and he did not let the people go.
Exodus 7:14
And LORD said to Moses, Pharaoh's heart is stubborn; he refuses to let the people go.
Exodus 8:32
And Pharaoh hardened his heart this time also, and he did not let the people go.
Exodus 9:12
And LORD hardened the heart of Pharaoh, and he did not hearken to them, as LORD had spoken to Moses.
Job 9:4
[He is] wise in heart, and mighty in strength. Who has hardened himself against him, and prospered?
Proverbs 29:1
He who, being often reproved, hardens his neck shall suddenly be destroyed, and that without remedy.
Isaiah 48:4
Because I knew that thou are obstinate, and thy neck is an iron sinew, and thy brow brass,
Daniel 5:20
But when his heart was lifted up, and his spirit was hardened so that he dealt proudly, he was deposed from his kingly throne. And they took his glory from him,
Romans 9:18
So then he is merciful to whom he will, and whom he will he hardens.