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].
Jewish Publication Society of America Version (JPS1917) - Exodus 8:24 >(8-20) And the LORD 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 ruined by reason of the swarms of flies.