'Swarm' in the Bible

The Nile will swarm with frogs, and they will come up and go into your house, in your bedroom, and on your bed, and into the houses of your servants and your people, and into your ovens and your kneading troughs.

The Lord did so; a thick swarm of flies came into Pharaoh's house and into the houses of his servants, and throughout the whole land of Egypt the land was ruined because of the swarms of flies.