Ezekiel 41:5

3Then he went inward and measured each post of the entrance, two cubits; and the entrance, six cubits; and the width of the entrance, seven cubits.

4He measured its length, twenty cubits, and the width, twenty cubits, before the nave. He said to me, “This is the most holy place.”

5Then he measured the wall of the house, six cubits; and the width of every side room, four cubits, all around the house on every side.

6The side rooms were in three stories, one over another, and thirty in each story. They entered into the wall which belonged to the house for the side rooms all around, that they might be supported and not penetrate the wall of the house.

7The side rooms were wider on the higher levels, because the walls were narrower at the higher levels. Therefore the width of the house increased upward; and so one went up from the lowest level to the highest through the middle level.