Exodus 8:21

I warn you that if you refuse, I will punish you by sending flies on you, your officials, and your people. The houses of the Egyptians will be full of flies. The ground will be covered with them.

Psalm 78:45

He sent a swarm of flies that bit them and frogs that ruined them.

Psalm 105:31

He spoke, and swarms of flies and gnats infested their entire territory.

Isaiah 7:18

In that day Jehovah will whistle for the flies that are at the distant branches of the Nile River in Egypt and for the bees that are in Assyria.

Treasury of Scripture Knowledge

Summary

Else, if thou wilt not let my people go, behold, I will send swarms of flies upon thee, and upon thy servants, and upon thy people, and into thy houses: and the houses of the Egyptians shall be full of swarms of flies, and also the ground whereon they are.

Bible References

Swarms

Psalm 78:45
He sent a swarm of flies that bit them and frogs that ruined them.
Psalm 105:31
He spoke, and swarms of flies and gnats infested their entire territory.
Isaiah 7:18
In that day Jehovah will whistle for the flies that are at the distant branches of the Nile River in Egypt and for the bees that are in Assyria.