Ezekiel 41:6

And the side-chambers were three, an addition to the Temple in three stories, one over another and thirty in order, in each row or story, ninety all told; and they entered into the wall which was of the house for the side-chambers round about, so that their joists rested upon the wall of the Sanctuary proper, that they might have hold, resting upon this solid wall, but they had not hold in the wall of the house, they were not sunk into the masonry.