'Deepest' in the Bible

Let darkness and the deepest shadow claim it; let a cloud settle on it; let whatever blackens the day terrify it!

before I depart, never to return, to the land of darkness and the deepest shadow,

to the land of utter darkness, like the deepest darkness, and the deepest shadow and disorder, where even the light is like darkness."

Man puts an end to the darkness; he searches the farthest recesses for the ore in the deepest darkness.

Have the gates of death been revealed to you? Have you seen the gates of deepest darkness?