'Pit' in the Bible

And He said to them, “What man is there among you who has a sheep, and if it falls into a pit on the Sabbath, will he not take hold of it and lift it out?

Let them alone; they are blind guides of the blind. And if a blind man guides a blind man, both will fall into a pit.”

And He also spoke a parable to them: “A blind man cannot guide a blind man, can he? Will they not both fall into a pit?

Then the fifth angel sounded, and I saw a star from heaven which had fallen to the earth; and the key of the bottomless pit was given to him.

He opened the bottomless pit, and smoke went up out of the pit, like the smoke of a great furnace; and the sun and the air were darkened by the smoke of the pit.