Ezekiel 42:3-6

3Opposite the twenty cubits which were for the inner court, and opposite the pavement which was for the outer court, was gallery against gallery in three stories .

4And before the chambers was a walk of ten cubits breadth inward, a way of one cubit; and their doors toward the north.

5Now the upper chambers were narrower: for the galleries were higher than these, than the lower, and than the middle ones of the building.12

6For they were in three stories, but had not pillars as the pillars of the courts: therefore the upper chambers were set back more than the lower and the middle ones from the ground.