Why then do ye harden your hearts, as the Egyptians and Pharaoh hardened their hearts? when he had wrought wonderfully among them, did they not let the people go, and they departed?
And Moses and Aaron came in to Pharaoh, and said to him, Thus saith the LORD God of the Hebrews, How long wilt thou refuse to humble thyself before me? Let my people go, that they may serve me.
And I, behold I, will harden the hearts of the Egyptians, and they shall follow them: and I will get me honor upon Pharaoh, and upon all his host, upon his chariots and upon his horsemen.
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.