3 And I will harden Pharaoh's heart, and multiply my signs and my wonders in the land of Egypt.
6 And Moses and Aaron did as the LORD commanded them, so did they.
8 And the LORD spake unto Moses and unto Aaron, saying,
13 And he hardened Pharaoh's heart, that he hearkened not unto them; as the LORD had said.
14 And the LORD said unto Moses, Pharaoh's heart is hardened, he refuseth to let the people go.
23 And Pharaoh turned and went into his house, neither did he set his heart to this also.
25 And seven days were fulfilled, after that the LORD had smitten the river.