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.
Jewish Publication Society of America Version (JPS1917) - 1 Kings 6:16 >And he built twenty cubits on the hinder part of the house with boards of cedar from the floor unto the joists; he even built them for himself within, for a Sanctuary, even for the most holy place.