1 Kings 6:20-22

20The Holy of Holies was twenty cubits in length, twenty cubits in width, and twenty cubits in height (a cube), and he overlaid it with pure gold. He also overlaid the cedar altar [with gold].

21Solomon overlaid the interior of the house with pure gold, and he drew chains of gold across the front of the Holy of Holies (inner sanctuary), and he overlaid it with gold.

22Then he overlaid the entire house with gold, until the whole house was finished. He also overlaid the entire [incense] altar which was by the Holy of Holies with gold.