2 Chronicles 12:15
Now the acts of Rehoboam, first and last, are they not written in the book of Shemaiah the prophet, and of Iddo the seer concerning genealogies? And there were wars between Rehoboam and Jeroboam continually. Now the acts of Rehoboam, first and last, are they not written in the book of Shemaiah the prophet, and of Iddo the seer concerning genealogies? And there were wars between Rehoboam and Jeroboam continually.
The verse closes the record of Rehoboam's reign over Judah after Solomon, when the ten tribes revolted under Jeroboam, who led Israel. It belongs to the brief account of the divided kingdom in which Rehoboam ruled Judah while Jeroboam led Israel, and to the record of Judah's kings beginning with that revolt. The rebellion of the ten tribes and the conflict between Judah and Israel form part of that same brief record.
By this time Israel had turned from God through Jeroboam's golden calves despite appeals from God's prophets. The chapter and account to which the verse belongs also includes Shishak's invasion and campaign against Judah during Rehoboam's reign. That Shishak campaign in 2 Chronicles 12 gives the fuller account of the event also mentioned in 1 Kings 14.
The Karnak inscription recording 156 places taken in that campaign, including Jerusalem and other towns named in the Old Testament, provides historical evidence and support for the account in 2 Chronicles 12. The list of captured places, including Jerusalem, confirms the campaign against Judah.
The first and last acts of Rehoboam son of Solomon were recorded not only in the book of the chronicles of the kings of Judah but also by Shemaiah the prophet and Iddo the seer, adding two volumes to the sacred history studied in the schools of the prophets. Iddo's account concerning genealogies shows special care taken to preserve Judah's genealogy by recording information about the tribe for future use. The mention of Shemaiah as prophet and Iddo as seer shows both were among the prophets outside the sixteen whose books appear from Isaiah to Malachi.
There were wars between Rehoboam and Jeroboam continually, with war between the two kingdoms continuing into the account of Jeroboam's reign, when Judah conquered. Rehoboam's record stands as an account of failure studied as a warning, showing that he failed utterly because he did not prepare his heart to seek the Lord.