Exodus 4:21
And the LORD said to Moses, When you go to return into Egypt, see that you do all those wonders before Pharaoh, which I have put in your hand: but I will harden his heart, that he shall not let the people go.
Torrey's Topical Textbook—AKJV

Joshua 11:20
For it was of the LORD to harden their hearts, that they should come against Israel in battle, that he might destroy them utterly, and that they might have no favor, but that he might destroy them, as the LORD commanded Moses.
Torrey's Topical Textbook—AKJV