Albert Barnes Commentary 2 Chronicles 16:7-10

"And at that time Hanani the seer came to Asa king of Judah, and said unto him, Because thou hast relied on the king of Syria, and hast not relied on Jehovah thy God, therefore is the host of the king of Syria escaped out of thy hand. Were not the Ethiopians and the Lubim a huge host, with chariots and horsemen exceeding many? yet, because thou didst rely on Jehovah, he delivered them into thy hand. For the eyes of Jehovah run to and fro throughout the whole earth, to show himself strong in the behalf of them whose heart is perfect toward him. Herein thou hast done foolishly; for from henceforth thou shalt have wars. Then Asa was wroth with the seer, and put him in the prison-house; for he was in a rage with him because of this thing. And Asa oppressed some of the people at the same time." — 2 Chronicles 16:7-10 (ASV)

The rebuke of Hanani and his imprisonment by Asa, omitted by the writer of Kings, are among the most important of the additions to Asa’s history for which we are indebted to the author of Chronicles.

Escaped out of thine hand (2 Chronicles 16:7) — Hanani means, “Had you been faithful and opposed the combined army of Israel and Syria in battle, instead of bribing the Syrian king to desert to your side, the entire army would have been delivered into your hand, as Zerah’s was. But now it has escaped from you. You have lost a glorious opportunity.”

From henceforth thou shalt have wars (2 Chronicles 16:9) — As peace had been the reward of Asa’s earlier faith (2 Chronicles 14:5; 2 Chronicles 15:5), so his lack of faith was now to be punished by a period of war and disturbance.

In a prison house (2 Chronicles 16:10) — Or, “in the stocks.” (Compare to 1 Kings 22:26–27).