Exodus 8:17-19

New Revised Standard Version, Anglicised

¹⁷ And they did so; Aaron stretched out his hand with his staff and struck the dust of the earth, and gnats came on humans and animals alike; all the dust of the earth turned into gnats throughout the whole land of Egypt. ¹⁸ The magicians tried to produce gnats by their secret arts, but they could not. There were gnats on both humans and animals. ¹⁹ And the magicians said to Pharaoh, ‘This is the finger of God!’ But Pharaoh’s heart was hardened, and he would not listen to them, just as the Lord had said.