Yechezkel 41:7-9

Orthodox Jewish Bible

⁷ And tzela’ot (side chambers, cells) were broader at each story; a ramp spiraled upward by stages around the Beis [HaMikdash]; therefore the width of the Beis increased as it went upward, so from the lowest to the highest through the middle.

⁸ I saw also the height of the Beis [HaMikdash] all around; the yesodot (foundations) of the tzela’ot were a full rod of six cubits long.

⁹ The thickness of the wall, which was for the tzela toward the outside, was five cubits; and that which was open was the space at the end of the tzela’ot of the Beis [HaMikdash].