Exodus 8:13

And the LORD did according to the word of Moses; and the frogs died out of the houses, out of the villages, and out of the fields.

And the Lord did according to the word of Moses. The plague was stayed. No more frogs were permitted to issue from the slimy banks of the river. But the myriads which had filled every crevice were, as a painful memorial of the miracle, left to die where they were, in order to show that their simultaneous death in all parts of the land was effected not by the hand of man, but by the power of God.