1 Kings 15:7

Now[R.V. And] the rest of the acts of Abijam Consisting no doubt principally of the great victory over Jeroboam near mount Zemaraim (2 Chronicles 13:17) which inflicted so much disaster and loss upon the northern kingdom, that Jeroboam did not recover strength again during Abijam's reign. The source from which the Chronicler drew his additional information about Abijam is called -the commentary of the prophet Iddo." (2 Chronicles 13:22.)

war between Abijam and Jeroboam Josephus (Ant.viii. 11. 2) says Jeroboam despised Abijam because of his youth.