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.
KJV
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].
ASV
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.