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 8:18-19

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. 8:19 The magicians said to Pharaoh, “It is the finger of God!” But Pharaoh’s heart remained hard, and he did not listen to them, just as the Lord had predicted.