American Standard Version (ASV):
And Jehovah did so; and there came grievous swarms of flies into the house of Pharaoh, and into his servants’ houses: and in all the land of Egypt the land was corrupted by reason of the swarms of flies.
King James Version (KJV):
And the LORD did so; and there came a grievous swarm [of flies] into the house of Pharaoh, and [into] his servants’ houses, and into all the land of Egypt: the land was corrupted by reason of the swarm [of flies].