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.

Exodus 14:21

14:21 Moses stretched out his hand toward the sea, and the Lord drove the sea apart by a strong east wind all that night, and he made the sea into dry land, and the water was divided.

Exodus 14:27

14:27 So Moses extended his hand toward the sea, and the sea returned to its normal state when the sun began to rise. Now the Egyptians were fleeing before it, but the Lord overthrew the Egyptians in the middle of the sea.