Melachim Alef 6:8-10

Orthodox Jewish Bible

⁸ The door for the middle story was in the right side of the Beis [Hamikdash]; and they went up with winding stairs into the middle chamber, and out of the middle into the third.

⁹ So he built the Beis [Hamikdash], and finished it; and covered the Beis [Hamikdash] with beams and boards of cedar.

¹⁰ And then he built chambers against all the Beis [Hamikdash], five cubits high; and they rested on the Beis [Hamikdash] with timber of cedar.