'Deep' 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?'

"King Nebuchadnezzar of Babylon devoured me and drove my people out. Like a monster from the deep he swallowed me. He filled his belly with my riches. He made me an empty dish. He completely cleaned me out."