²¹ And the LORD said to Moses, When thou goest to return into Egypt, see that thou perform all those wonders before Pharaoh which I have put in thy hand: but I will harden his heart, that he shall not let the people go.

⁴ And I will harden Pharaoh's heart, that he shall follow them; and I will be honored upon Pharaoh, and upon all his host; that the Egyptians may know that I am the LORD. And they did so.