Exodus 7:14 in the King James Version
And the LORD said unto Moses, Pharaoh’s heart is hardened, he refuseth to let the people go.
Context
13 Pharaoh’s heart was hardened, and he didn’t listen to them, as the LORD had spoken.
14 The LORD said to Moses, “Pharaoh’s heart is stubborn. He refuses to let the people go.
15 Go to Pharaoh in the morning. Behold, he is going out to the water. You shall stand by the river’s bank to meet him. You shall take the rod which was turned to a serpent in your hand.