Exodus 8:14-16

Amplified Bible

¹⁴ So they piled them up in heaps, and the land was detestable and stank. ¹⁵ But when Pharaoh saw that there was [temporary] relief, he hardened his heart and would not listen or pay attention to them, just as the Lord had said.

The Plagues of Gnats and Insects

¹⁶ Then the Lord said to Moses, “Say to Aaron, ‘Stretch out your staff and strike the dust of the ground, and it will become [biting] gnats (lice) throughout the land of Egypt.’”