1 Kings 6:20-22

20The inner sanctuary was twenty cubits long, twenty cubits wide, and twenty cubits high. He overlaid the inside with pure gold, and he also overlaid the altar of cedar.1

21So Solomon overlaid the inside of the temple with pure gold, and he extended gold chains2 across the front of the inner sanctuary, which was overlaid with gold. 22So he overlaid with gold the whole interior of the temple, until everything was completely finished. He also overlaid with gold the entire altar that belonged to the inner sanctuary.