'Hardened' in the Bible

But when Pharaoh saw that there was relief, he hardened his heart and did not listen to them, just as the LORD had predicted.

But this time also Pharaoh hardened his heart, and he did not let the people go.

When Pharaoh saw that the rain, hail, and thunder had stopped, he continued to sin. He, along with his officials,hardened his heart.

Then the LORD told Moses, "Go to Pharaoh, for I've hardened his heart and the hearts of his officials in order to perform these signs of mine among them,