Exodus 8:15 KJV
But when Pharaoh saw that there was respite, he hardened his heart, and hearkened not unto them; as the Lord had said.
Exodus 8:15, King James Version
In context
14 And they gathered them together upon heaps: and the land stank.
15 But when Pharaoh saw that there was respite, he hardened his heart, and hearkened not unto them; as the Lord had said.
16 And the Lord said unto Moses, Say unto Aaron, Stretch out thy rod, and smite the dust of the land, that it may become lice throughout all the land of Egypt.