Exodus 8:15 in the King James Version
But when Pharaoh saw that there was respite, he hardened his heart, and hearkened not unto them; as the LORD had said.
Context
14 They gathered them together in heaps, and the land stank.
15 But when Pharaoh saw that there was a respite, he hardened his heart, and didn’t listen to them, as the LORD had spoken.
16 The LORD said to Moses, “Tell Aaron, ‘Stretch out your rod, and strike the dust of the earth, that it may become lice throughout all the land of Egypt.’”