Charles Ellicott Commentary 2 Chronicles 9:6

"Howbeit I believed not their words, until I came, and mine eyes had seen it; and, behold, the half of the greatness of thy wisdom was not told me: thou exceedest the fame that I heard." — 2 Chronicles 9:6 (ASV)

The one half of the greatness of your wisdom. —Kings has simply, the half was not told me. The chronicler has made an explanatory addition. (See 1 Chronicles 12:29 and 2 Chronicles 30:18 for the word marbith, “increase,” “multitude,” which occurs three times in the Chronicles and twice elsewhere.)

You exceed the fame. —Literally, You have added to the report. Kings, more fully, You have added wisdom and weal to the report.