2 Chronicles 3:8-9

ISV^{(i) 8} With respect to the Most Holy Place in the Temple, its length across the width of the Temple was 20 cubits, and its width extended 20 cubits.
Materials of the TempleSolomon overlaid it with 600 talents of pure gold. ⁹ The gold nails weighed 50 shekels. He also overlaid the upper rooms with gold.