2 Chronicles 3:8

3:8 He made the most holy place; its length was 30 feet, corresponding to the width of the temple, and its width 30 feet. He plated it with 600 talents of fine gold.

2 Chronicles 29:1

Hezekiah Consecrates the Temple

29:1 Hezekiah was twenty-five years old when he began to reign, and he reigned twenty-nine years in Jerusalem. His mother was Abijah, the daughter of Zechariah.