'Lowest' in the Bible

I'll make sure that you go straight to the Pit, into the lowest part of the earth, where you'll be with people who lived in ancient times. You'll keep company there with the dead, who have gone into the Pit. As a result, your city won't be inhabited. Meanwhile, I will display my glory in the land of the living.

The side chambers surrounding the Temple were wider at each successive story, because the surrounding structure ascended by proportional increments as it rose, ascending to the highest story by going up successively from the lowest.