Ezekiel 41:7

and, consequently, this ledge of the house being added to the upper gallery, all around the width of the upper gallery was enlarged by an additional breadth equal to this ledge as one ascended from the lowermost to the second story, and from the second to the third story.

And the breadth of the upper side was made according to the projection out of the wall, against the upper one round about the house, that it might be enlarged above, and that men might go up to the upper chambers from those below, and from the ground-sills to the third story.