Exodus 8:5-7

5Then the LORD said to Moses, “Tell Aaron, ‘Stretch out your hand with your staff over the streams and canals and ponds, and make frogs come up on the land of Egypt.’ ” 6So Aaron stretched out his hand over the waters of Egypt, and the frogs came up and covered the land.

7But the magicians did the same things by their secret arts; they also made frogs come up on the land of Egypt.