Exodus 8:5-7

8:5 The Lord spoke to Moses, “Tell Aaron, ‘Extend your hand with your staff over the rivers, over the canals, and over the ponds, and bring the frogs up over the land of Egypt.’” 8:6 So Aaron extended his hand over the waters of Egypt, and frogs came up and covered the land of Egypt.

8:7 The magicians did the same with their secret arts and brought up frogs on the land of Egypt too.