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.