Flies in the Bible

Ecclesiastes 10:1 Dead flies cause the ointment of the apothecary to send forth a stinking savour: so doth a little folly him that is in reputation for wisdom and honour.

Exodus 8:21-31 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. 22 And I will sever in that day the land of Goshen, in which my people dwell, that no swarms of flies shall be there; to the end thou mayest know that I am the LORD in the midst of the earth. 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. ...
Psalm 78:45 He sent divers sorts of flies among them, which devoured them; and frogs, which destroyed them.
Psalm 105:31 He spake, and there came divers sorts of flies, and lice in all their coasts.

FIGURATIVE

Isaiah 7:18 And it shall come to pass in that day, that the LORD shall hiss for the fly that is in the uttermost part of the rivers of Egypt, and for the bee that is in the land of Assyria.