And he said, "Tomorrow." Moses said, "As you say! So that you may know that there is no one like the Lord our God,
the frogs shall leave you and your houses and your officials and your people; they shall be left only in the Nile."
Then Moses and Aaron went out from Pharaoh; and Moses cried out to the Lord concerning the frogs that he had brought upon Pharaoh.
References for Exodus 8:12
And the Lord did as Moses requested: the frogs died in the houses, the courtyards, and the fields.
And they gathered them together in heaps, and the land stank.
But when Pharaoh saw that there was a respite, he hardened his heart, and would not listen to them, just as the Lord had said.
Then the Lord said to Moses, "Say to Aaron, "Stretch out your staff and strike the dust of the earth, so that it may become gnats throughout the whole land of Egypt.' "
And they did so; Aaron stretched out his hand with his staff and struck the dust of the earth, and gnats came on humans and animals alike; all the dust of the earth turned into gnats throughout the whole land of Egypt.
The magicians tried to produce gnats by their secret arts, but they could not. There were gnats on both humans and animals.
And the magicians said to Pharaoh, "This is the finger of God!" But Pharaoh's heart was hardened, and he would not listen to them, just as the Lord had said.
Then the Lord said to Moses, "Rise early in the morning and present yourself before Pharaoh, as he goes out to the water, and say to him, "Thus says the Lord: Let my people go, so that they may worship me.