Exodus 8:5

8:5 The Lord spoke to Moses, “Tell Aaron, ‘Extend your hand with your staff over the rivers, over the canals, and over the ponds, and bring the frogs up over the land of Egypt.’”

Exodus 8:17

8:17 They did so; Aaron extended his hand with his staff, he struck the dust of the ground, and it became gnats on people and on animals. All the dust of the ground became gnats throughout all the land of Egypt.