'Ribs' in the Bible

and he buildeth the walls of the house within with beams of cedar, from the floor of the house unto the walls of the ceiling; he hath overlaid with wood the inside, and covereth the floor of the house with ribs of fir.

And he buildeth the twenty cubits on the sides of the house with ribs of cedar, from the floor unto the walls; and he buildeth for it within, for the oracle, for the holy of holies.