Ezekiel 41:5-7

5After he measured the wall of the house, six cubits; and the breadth of every side chamber, four cubits, round about the house on every side.

6And the side chambers were three, one over another, and thirty in order; and they entered into the wall which was of the house for the side chambers round about, that they might have hold, but they had not hold in the wall of the house.123

7And 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.4