Psalms 105:31

²¹Else, if you will not let my people go, behold, I will send swarms of flies on you, and on your servants, and on your people, and into your houses. The houses of the Egyptians shall be full of swarms of flies, and also the ground they are on. ²²I will set apart in that day the land of Goshen, in which my people dwell, that no swarms of flies shall be there, to the end you may know that I am the LORD on the earth. ²³I will put a division between my people and your people. This sign shall happen by tomorrow.”’” ²⁴The LORD did so; and there came grievous swarms of flies into the house of Pharaoh, and into his servants’ houses. In all the land of Egypt the land was corrupted by reason of the swarms of flies.

⁴⁵He sent among them swarms of flies, which devoured them; and frogs, which destroyed them.

¹⁶The LORD said to Moses, “Tell Aaron, ‘Stretch out your rod, and strike the dust of the earth, that it may become lice throughout all the land of Egypt.’” ¹⁷They did so; and Aaron stretched out his hand with his rod, and struck the dust of the earth, and there were lice on man, and on animal; all the dust of the earth became lice throughout all the land of Egypt. ¹⁸The magicians tried with their enchantments to produce lice, but they couldn’t. There were lice on man, and on animal.

¹⁸It will happen in that day that the LORD will whistle 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.