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.

Exodus 7:22

7:22 But the magicians of Egypt did the same by their secret arts, and so Pharaoh’s heart remained hard, and he refused to listen to Moses and Aaron – just as the Lord had predicted.