'Gnats' in the Bible

The Lord said to Moses, "Tell Aaron, 'Extend your staff and strike the dust of the ground, and it will become gnats throughout all the land of Egypt.'"

They did so; Aaron extended his hand with his staff, he struck the dust of the ground, and it became gnats on people and on animals. All the dust of the ground became gnats throughout all the land of Egypt.

When the magicians attempted to bring forth gnats by their secret arts, they could not. So there were gnats on people and on animals.

He ordered flies to come; gnats invaded their whole territory.

Look up at the sky! Look at the earth below! For the sky will dissipate like smoke, and the earth will wear out like clothes; its residents will die like gnats. But the deliverance I give is permanent; the vindication I provide will not disappear.