Charles Ellicott Commentary 2 Chronicles 9:13

"Now the weight of gold that came to Solomon in one year was six hundred and threescore and six talents of gold," — 2 Chronicles 9:13 (ASV)

(b) SOLOMON’S INCOME, SPLENDOUR, AND DOMINION —(2 Chronicles 9:13–28). Compare to 1 Kings 10:14–29, and 1 Kings 4:26–27.

Now the weight of gold. —See 1 Kings 10:14, with which this verse coincides.