Exodus 14:3-4

For Pharaoh will say of the Israelites, ‘They are wandering aimlessly in the land; the wilderness has shut them in.’ I will harden (make stubborn, defiant) Pharaoh’s heart, so that he will pursue them; and I will be glorified and honored through Pharaoh and all his army, and the Egyptians shall know [without any doubt] and acknowledge that I am the LORD.” And they did so.