Parallel
Exodus 9:12
King James Version (1769 Blayney revision, with Apocrypha) · Berean Standard Bible
And the Lord hardened the heart of Pharaoh, and he hearkened not unto them; as the Lord had spoken unto Moses.
But the LORD hardened (note: Or stiffened or strengthened; also in verse 35) Pharaoh’s heart, and he would not listen to them, just as the LORD had said to Moses.