'Darkness' in the Bible

They did not ask: 'Where is the Lord who delivered us out of Egypt, who brought us through the wilderness, through a land of desert sands and rift valleys, through a land of drought and deep darkness, through a land in which no one travels, and where no one lives?'

Show the Lord your God the respect that is due him. Do it before he brings the darkness of disaster. Do it before you stumble into distress like a traveler on the mountains at twilight. Do it before he turns the light of deliverance you hope for into the darkness and gloom of exile.