'Heart Was Hardened' in the Bible

Pharaoh's heart was hardened, and he did not listen to them; as the LORD had spoken.

The magicians of Egypt did in like manner with their secret arts; and Pharaoh's heart was hardened, and he did not listen to them; as the LORD had spoken.

Then the magicians said to Pharaoh, "This is the finger of God:" and Pharaoh's heart was hardened, and he did not listen to them; as the LORD had spoken.