And the heart of Pharaoh was hardened, neither would he let the children of Israel go; as Yahweh had spoken by Moses.
And I am sure that the king of Egypt will not let you go, no, not by a mighty hand.
And Yahweh 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.
And he hardened Pharaoh's heart, that he hearkened not unto them; as Yahweh had said.
And when Pharaoh saw that the rain and the hail and the thunders were ceased, he sinned yet more, and hardened his heart, he and his servants.