2 Chronicles 3:7-9

He overlaid the beams, thresholds, walls, and doors throughout the Temple with gold, and he carved figures of cherubim on the walls. He made the Most Holy Place 30 feet wide, corresponding to the width of the Temple, and 30 feet deep. He overlaid its interior with 23 tons of fine gold. The gold nails that were used weighed 20 ounces each. He also overlaid the walls of the upper rooms with gold.