Exodus 8:1-9

1 Then the LORD said to Moses, "Go to Pharaoh, and tell him, 'This is what the LORD says: Let my people go to worship me.
2 If you refuse to let them go, I will bring a plague of frogs on your whole country.
3 The Nile River will swarm with frogs. They will come into your palace, into your bedroom, on your bed, into the houses of your officials, on your people, into your ovens and into your mixing bowls.
4 The frogs will jump on you, on your people, and on all your officials.'"
5 Then the LORD said to Moses, "Tell Aaron, 'Hold your staff over the rivers, canals, and ponds. This will bring frogs onto the land.'"
6 So Aaron held his staff over the waters of Egypt. The frogs came up and covered the land of Egypt.
7 But the magicians did the same thing using their magic spells and brought frogs onto the land.
8 Pharaoh sent for Moses and Aaron and said, "Pray that the LORD will take the frogs away from me and my people. Then I will let your people go to offer sacrifices to the LORD."
9 Moses answered Pharaoh, "You may have the honor of choosing when I should pray for you, your officials, and your people. Then the frogs will leave you and your homes. The only ones left will be those in the Nile."