Exodus 8:16-19 - Plague Three: Gnats
16 And Jehovah will say to Moses, Say to Aaron, Stretch forth thy rod and smite the dust of the earth, and it shall be for gnats upon all the land of Egypt 17 And they will do so; and Aaron will stretch forth his hand with his rod, and will smite the dust of the earth, and it will be gnats upon man and in quadrupeds: all the dust of the earth was gnats upon all the land of Egypt 18 And the sacred scribes will do so with their enchantments to bring forth gnats, and they will not be able: and there will be gnats upon man and upon quadrupeds.
19 And the sacred scribes will say to Pharaoh, This the finger of God: and Pharaoh's heart will be strengthened, and he heard not to them: as Jehovah said.