Exodus 8:12-15

"And Moses and Aaron went out from Pharaoh: and Moses cried unto Jehovah concerning the frogs which he had brought upon Pharaoh. And Jehovah did according to the word of Moses; and the frogs died out of the houses, out of the courts, and out of the fields. And they gathered them together in heaps; and the land stank. But when Pharaoh saw that there was respite, he hardened his heart, and hearkened not unto them,' as Jehovah had spoken."

These verses recount the removal of the plague. The frogs did not merely vanish, they died! What a smell of death must have gone up from all Egypt! Heaps upon heaps of dead frogs everywhere! No one could deny that the plague had occurred, for the evidence remained afterward, and what a clean up that must have been!

Now Pharaoh had specifically promised that he would let the people go; "But he was more impressed by his own relief than by the power of God, and he forgot his promise."[13]

"But when Pharaoh saw that there was respite ..." This literally means "a taking of breath," or "a breathing place."[14] But Keil captured the full implications of the passage thus: "As soon as he `got air' he hardened his heart."[15] Keil has frequently been quoted by others in this rendition.