Melachim Alef 6:4-6

Orthodox Jewish Bible

⁴ And for the Beis [Hamikdash] he made embrasures.

⁵ And against the wall of the Beis [Hamikdash] he built chambers round about, against the walls of the Beis [Hamikdash] round about, both of the Heikhal and of the Debir; and he made chambers round about;

⁶ The lowest story was five cubits broad, and the middle was six cubits broad, and the third was seven cubits broad; for without in the wall of the Beis [Hamikdash] he made narrow ledges round about, that the beams should not be fastened in the walls of the Beis [Hamikdash].