Exodus 8:15-17

New Revised Standard Version, Anglicised Catholic Edition

¹⁵ But when Pharaoh saw that there was a respite, he hardened his heart, and would not listen to them, just as the Lord had said.

The Third Plague: Gnats

¹⁶ Then the Lord said to Moses, ‘Say to Aaron, “Stretch out your staff and strike the dust of the earth, so that it may become gnats throughout the whole land of Egypt.”’ ¹⁷ And they did so; Aaron stretched out his hand with his staff and struck the dust of the earth, and gnats came on humans and animals alike; all the dust of the earth turned into gnats throughout the whole land of Egypt.