Exodus 9:12

But the Lord hardened Pharaoh’s heart, and he would not listen to them, just as the Lord had said to Moses.

Note Or stiffened or strengthened; also in verse 35

And the Lord hardened the heart of Pharaoh, and he hearkened not unto them; as the Lord had spoken unto Moses.

The Lord hardened the heart of Pharaoh, and he didn’t listen to them, as the Lord had spoken to Moses.

And Jehovah hardened the heart of Pharaoh, and he hearkened not unto them, as Jehovah had spoken unto Moses.