1 Kings 6:18

16He built twenty cubits of the back part of the house with boards of cedar from the floor to the ceiling. He built this within, for an inner sanctuary, even for the most holy place.

17In front of the temple sanctuary was forty cubits long.

18There was cedar on the house within, carved with buds and open flowers. All was cedar. No stone was visible.

19He prepared an inner sanctuary in the middle of the house within, to set the ark of the LORD’s covenant there.

20Within the inner sanctuary was twenty cubits in length, and twenty cubits in width, and twenty cubits in its height. He overlaid it with pure gold. He covered the altar with cedar.