And they gathered them together in heaps, and the land stank.
But when Pharaoh saw that there was a respite, he hardened his heart, and would not listen to them; as the LORD had said.
Then the LORD said to Moses, "Say to Aaron, 'Stretch out your rod and strike the dust of the earth, that it may become gnats throughout all the land of Egypt.'"
And they did so; Aaron stretched out his hand with his rod, and struck the dust of the earth, and there came gnats on man and beast; all the dust of the earth became gnats throughout all the land of Egypt.
The magicians tried by their secret arts to bring forth gnats, but they could not. So there were gnats on man and beast.
And the magicians said to Pharaoh, "This is the finger of God." But Pharaoh's heart was hardened, and he would not listen to them; as the LORD had said.
Then the LORD said to Moses, "Rise up early in the morning and wait for Pharaoh, as he goes out to the water, and say to him, 'Thus says the LORD, "Let my people go, that they may serve me.
Else, if you will not let my people go, behold, I will send swarms of flies on you and your servants and your people, and into your houses; and the houses of the Egyptians shall be filled with swarms of flies, and also the ground on which they stand.
But on that day I will set apart the land of Goshen, where my people dwell, so that no swarms of flies shall be there; that you may know that I am the LORD in the midst of the earth.
Thus I will put a division between my people and your people. By tomorrow shall this sign be."'"
And the LORD did so; there came great swarms of flies into the house of Pharaoh and into his servants' houses, and in all the land of Egypt the land was ruined by reason of the flies.
Revised Standard Version of the Bible, copyright 1952 [2nd edition, 1971] by the Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved. (Revised Standard Version - Holy Bible)