Exodus 8:15, 19
Exodus 8:15 NASB1995
But when Pharaoh saw that there was relief, he hardened his heart and did not listen to them, as the LORD had said.
Exodus 8:19 NASB1995
Then the magicians said to Pharaoh, “This is the finger of God.” But Pharaoh’s heart was hardened, and he did not listen to them, as the LORD had said.