Exodus 10:21-23

The Plague of Darkness 21Then the LORD said to Moses, “Stretch out your hand toward the sky so that darkness spreads over Egypt—darkness that can be felt.” 22So Moses stretched out his hand toward the sky, and total darkness covered all Egypt for three days.

23No one could see anyone else or move about for three days. Yet all the Israelites had light in the places where they lived.