'Swarm' in the Bible

And the Nile will swarm with frogs, and they will go up and come into your house and into your {bedroom} and onto your bed and into the house of your servants and among your people and into your ovens and into your kneading troughs.

And Yahweh did so, and a {severe} [swarm of] flies came to the house of Pharaoh and the house of his servants and in all the land of Egypt; the land was ruined because of the flies.