Exodus 8:15

11 The frogs will depart from you and your houses and your officials and your people; they will remain only in the Nile.”

12 After Moses and Aaron had left Pharaoh, Moses cried out to the LORD for help with the frogs that He had brought against Pharaoh.

13 And the LORD did as Moses requested, and the frogs in the houses, the courtyards, and the fields died.

14 They were piled into countless heaps, and there was a terrible stench in the land.

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

16 Then the LORD said to Moses, “Tell Aaron, ‘Stretch out your staff and strike the dust of the earth, that it may turn into swarms of gnats throughout the land of Egypt.’”

17 This they did, and when Aaron stretched out his hand with his staff and struck the dust of the earth, gnats came upon man and beast. All the dust of the earth turned into gnats throughout the land of Egypt.

18 The magicians tried to produce gnats using their magic arts, but they could not. And the gnats remained on man and beast.

19 “This is the finger of God,” the magicians said to Pharaoh. But Pharaoh’s heart was hardened, and he would not listen to them, just as the LORD had said.

Read all of Exodus 8