The Lord did so, and great swarms of flies came into the house of Pharaoh, and into his servants’ houses, and into all the land of Egypt. The land was corrupted because of the swarms of flies.
Otherwise, if you will not let My people go, behold, I will send swarms of flies on you and on your servants and on your people, and into your houses. And the houses of the Egyptians shall be full of swarms of flies and also the ground wherever they are.