1 Kings 6:6, 10

the nethermost chamber 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 house he made narrowed rests round about, that the beams should not be fastened in the walls of the house.

And then he built chambers against all the house, five cubits high: and they rested on the house with timber of cedar.