But when Pharaoh saw that there was respite, he hardened his heart, and hearkened not unto them; as the LORD had said.
And the LORD said unto Moses, Go in unto Pharaoh: for I have hardened his heart, and the heart of his servants, that I might shew these my signs before him:
But the LORD hardened Pharaoh's heart, so that he would not let the children of Israel go.
But the LORD hardened Pharaoh's heart, and he would not let them go.