2 Chronicles 3:7-9

He also overlaid the house with gold—the beams, the thresholds and its walls and its doors; and he carved cherubim on the walls. Now he made the room of the holy of holies: its length across the width of the house was twenty cubits, and its width was twenty cubits; and he overlaid it with fine gold, amounting to 600 talents. The weight of the nails was fifty shekels of gold. He also overlaid the upper rooms with gold.