'Flies' in the Bible
But if you are not [about to] release my people, look, I [am about] to send out flies among you and among your servants and among your people and in your houses; and the houses of Egypt will fill up with the flies and also the ground that they are on.
But on that day I will distinguish the land of Goshen, where my people are staying, by there not being flies there, so that you will know that I [am] Yahweh in the midst of the land.
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.
And Moses said, "Look, I [am] going out from you, and I will pray to Yahweh so that the flies depart from Pharaoh, from his servants, and from his people tomorrow. Only let not Pharaoh again deceive [us] by not releasing the people to sacrifice to Yahweh."
And Yahweh did according to the word of Moses and removed the flies from Pharaoh, from his servants, and from his people; not one was left.