Yechezkel 41:6-8

Orthodox Jewish Bible

⁶ And the tzela’ot (side chambers, cells) were tzela over tzela, thirty-three in number; and there were ledges on the wall which was of the Beis for the tzela’ot round about, that they might take hold there, but they had not hold in the wall of the Beis [HaMikdash].

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.