TSK · Exodus 9:7

And Pharaoh's heart was hardened, and he hearkened not unto them; as Jehovah had spoken.

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

[ He is] wise in heart, and mighty in strength: Who hath hardened himself against him, and prospered?--

Because I knew that thou art obstinate, and thy neck is an iron sinew, and thy brow brass;

So then he hath mercy on whom he will, and whom he will be hardeneth.