Exodus 8:16-19

16Then the Lord said to Moses, ‘Say to Aaron, “Lift up your stick and hit the dirt on the ground. It will become gnats in the whole land of Egypt.” ’

17Moses and Aaron obeyed God. Aaron lifted up his hand and he hit the dirt with his stick. The dirt became gnats that flew onto all the people and onto all the animals. The dirt on the ground became gnats all over Egypt.

18Then the Egyptian magicians tried to use their magic to make gnats appear. But they could not do it. The gnats were on all the people and on all the animals.

19Then the magicians said to Pharaoh, ‘This is the work of God.’ But there was no change in Pharaoh's thoughts. He would not listen to them. The Lord had said that this would happen, and it did!