Exodus 10:27 in the King James Version
But the LORD hardened Pharaoh’s heart, and he would not let them go.
Context
26 Our livestock also shall go with us. Not a hoof shall be left behind, for of it we must take to serve the LORD our God; and we don’t know with what we must serve the LORD, until we come there.”
27 But the LORD hardened Pharaoh’s heart, and he wouldn’t let them go.
28 Pharaoh said to him, “Get away from me! Be careful to see my face no more; for in the day you see my face you shall die!”