1 Kings 6:16

He partitioned off the twenty cubits at the rear of the temple with cedar boards from floor to ceiling to form within the temple an inner sanctuary, the Most Holy Place.

Note Or the Holy of Holies

And he built twenty cubits on the sides of the house, both the floor and the walls with boards of cedar: he even built them for it within, even for the oracle, even for the most holy place.

He 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.

And he built twenty cubits on the hinder part of the house with boards of cedar from the floor unto the walls of the ceiling: he built them for it within, for an oracle, even for the most holy place.