The rest of the acts of Abijam and all that he did, are they not written in the Book of the Chronicles of the Kings of Judah? And there was war between Abijam and Jeroboam.
We have here a short account of the short reign of Abijam the son of Rehoboam king of Judah. He makes a better figure, 2 Chr. 13, where we have an account of his war with Jeroboam, the speech which he made before the armies engaged, and the wonderful victory he obtained by the help of God.
Commenting on 1 Kings 15:1-8
And in the twentieth year of Jeroboam king of Israel reigned Asa over Judah. How this is to be accounted for See Gill on Kg1 15:2. . 1 Kings 15:10 kg1 15:10 kg1 15:10 kg1 15:10And forty one years reigned he in Jerusalem,....
1Ki 15:6-8 “And there was war between Rehoboam and Jeroboam all his life;” i.e., the state of hostility which had already existed between Rehoboam and Jeroboam continued “all the days of his life,” or so long as Abijam lived and reigned.
Commenting on 1 Kings 15:6-8