2 Chronicles 3:8
And he made the most holy house, the length whereof was according to the breadth of the house, twenty cubits, and the breadth thereof twenty cubits: and he overlaid it with fine gold, amounting to six hundred talents. (2 Chronicles 3:8)
According to the breadth.
 The most holy place was a perfect cube, 20 cu. in length, breadth, and height (see 1 Kings 6:20).
Six hundred talents.
This would be about 22 tons of gold (18 metric tons) if a talent is to be reckoned at 75.39 lb.