Ezekiel 41:8

And there was an enlarging, and a winding about still upward to the side chambers: for the winding about of the house went still upward round about the house: therefore the breadth of the house was still upward, and so increased from the lowest chamber to the highest by the midst.

The thickness of the wall, which was for the side chamber without, was five cubits: and that which was left was the place of the side chambers that were within.