Exodus 8:7
8:7 The magicians did the same with their secret arts and brought up frogs on the land of Egypt too.
Exodus 7:11
7:11 Then Pharaoh also summoned wise men and sorcerers, and the magicians of Egypt by their secret arts did the same thing.
Exodus 8:18
8:18 When the magicians attempted to bring forth gnats by their secret arts, they could not. So there were gnats on people and on animals.