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

³ And I will harden Pharaoh's heart, and multiply my signs and my wonders in the land of Egypt.

¹⁵ But when Pharaoh saw that there was respite, he hardened his heart, and hearkened not unto them; as the Lord had said.