Ezekiel 41:8-11

8And I saw that the house had an elevation round about: the foundations of the side-chambers, a full reed, six cubits to the joint.

9The thickness of the wall, which was for the side-chambers without, was five cubits, as also what was left free along the building of the side-chambers that pertained to the house.

10And between the cells [and the house] was a width of twenty cubits round about the house on every side.

11And the entry of the side-chambers was toward what was left free, one entry toward the north, and one entry toward the south; and the width of the space left free was five cubits round about.