1 Kings 6:15-17

Young's Literal Translation

¹⁵ 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.

¹⁶ 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.

¹⁷ And forty by the cubit was the house, it [is] the temple before [it].