Exodus 8:15-17

New International Version - UK

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

The plague of gnats

¹⁶ Then the Lord said to Moses, ‘Tell Aaron, “Stretch out your staff and strike the dust of the ground,” and throughout the land of Egypt the dust will become gnats.’ ¹⁷ They did this, and when Aaron stretched out his hand with the staff and struck the dust of the ground, gnats came on people and animals. All the dust throughout the land of Egypt became gnats.