Exodus 8:12-15

New International Version

¹² After Moses and Aaron left Pharaoh, Moses cried out to the Lord about the frogs he had brought on Pharaoh. ¹³ And the Lord did what Moses asked.^(A) The frogs died in the houses, in the courtyards and in the fields. ¹⁴ They were piled into heaps, and the land reeked of them. ¹⁵ But when Pharaoh saw that there was relief,^(B) he hardened his heart^(C) and would not listen to Moses and Aaron, just as the Lord had said.