2 Chronicles 3:1-3

1Then Solomon began to build the house of the Lord in Jerusalem on Mount Moriah, where the Lord appeared to his father David, in the place that David had prepared, on the threshing floor of Ornan the Jebusite.

2Solomon began to build on the second day of the second month in the fourth year of his reign.

3Now this is the [measurement of the] foundation which Solomon laid for the house of God: the length in cubits—by the old standard of measure—was sixty cubits (90 ft.), and the width was twenty cubits (30 ft.).