Exodus 8:7-9

7The magicians did the same with their secret arts and brought up frogs on the land of Egypt too.

8Then Pharaoh summoned Moses and Aaron and said, “Pray to the Lord that he may take the frogs away from me and my people, and I will release the people that they may sacrifice to the Lord.”

9Moses said to Pharaoh, “You may have the honor over me – when shall I pray for you, your servants, and your people, for the frogs to be removed from you and your houses, so that they will be left only in the Nile?”