Exodus 8:11-15

11The 1frogs will depart from you and your houses, and from your servants and your people; they will be left only in the Nile.” 12Then Moses and Aaron went out from Pharaoh, and 2Moses cried out to the Lord concerning the frogs which He had 3inflicted upon Pharaoh. 13The Lord did according to the word of Moses, and the frogs died out of the houses, the courtyards, and the fields. 14So they piled them in heaps, and the land stank. 15But when Pharaoh saw that there was relief, he 4hardened his heart and 5did not listen to them, just as the Lord had said.