'Darkness' in the Bible

Yahweh said to Moses, "Stretch out your hand toward the sky, that there may be darkness over the land of Egypt, even darkness which may be felt."

Moses stretched forth his hand toward the sky, and there was a thick darkness in all the land of Egypt three days.

It came between the camp of Egypt and the camp of Israel; and there was the cloud and the darkness, yet gave it light by night: and the one didn't come near the other all the night.

The people stayed at a distance, and Moses drew near to the thick darkness where God was.