1)
Why did Shlomo mention how big Yisrael is?
1.
'Rashi' (Divrei ha'Yamim II, 1:10): They have many matters that come for judgment, and I do not have time to investigate each. Who can judge 1,000 cases in a day, if not a Chacham with Ru'ach Elokim?!
2.
Malbim: My small Chachmah is not enough to lead a nation so great, both in quality ("Amcha Asher Bacharta") and quantity ("Am Rav Asher Lo Yimaneh").
