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

So they took soot from a furnace and stood before Pharaoh, Moses threw it into the air, and it caused festering boils to break out on both people and animals.

“Set apart to me every firstborn male – the first offspring of every womb among the Israelites, whether human or animal; it is mine.”

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.