Exodus 8:24 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.
Exodus 8:24, King James Version
In context
23 And I will put a division between my people and thy people: to morrow shall this sign be.
24 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.
25 And Pharaoh called for Moses and for Aaron, and said, Go ye, sacrifice to your God in the land.