1 Kings 6:5-6

5Against the wall of the temple he built chambers all around, against the walls of the temple, all around the sanctuary and the inner sanctuary. Thus he made side chambers all around it.

6The lowest chamber was five cubits wide, the middle was six cubits wide, and the third was seven cubits wide; for he made narrow ledges around the outside of the temple, so that the support beams would not be fastened into the walls of the temple.