Exodus 8:6

8:6 So Aaron extended his hand over the waters of Egypt, and frogs came up and covered the land of Egypt.

Exodus 10:22

10:22 So Moses extended his hand toward heaven, and there was absolute darkness throughout the land of Egypt for three days.

Exodus 33:23

33:23 Then I will take away my hand, and you will see my back, but my face must not be seen.”