Exodus 8:16-19

¹⁶Then the Lord said to Moses, “Say to Aaron, ‘Extend your staff and strike the dust of the earth, so that it may turn into gnats through all the land of Egypt.’ ” ¹⁷They did so; and Aaron extended his hand with his staff and struck the dust of the earth, and there were gnats on every person and animal. All the dust of the earth turned into gnats through all the land of Egypt. ¹⁸The soothsayer priests tried with their secret arts to produce gnats, but they could not; so there were gnats on every person and animal. ¹⁹Then the soothsayer priests said to Pharaoh, “This is the finger of God.” But Pharaoh’s heart was hardened, and he did not listen to them, just as the Lord had said.