King James Version
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.English Standard Version
And the LORD did so. There came great swarms of flies into the house of Pharaoh and into his servants' houses. Throughout all the land of Egypt the land was ruined by the swarms of flies.New International Version
And the LORD did this. Dense swarms of flies poured into Pharaoh's palace and into the houses of his officials, and throughout Egypt the land was ruined by the flies.