In the eighteenth year of the reign of King Jeroboam of Israel, Abijah became king of Judah,
and he ruled three years in Jerusalem. His mother was Maacah, the daughter of Absalom.
He committed the same sins as his father and was not completely loyal to the Lord his God, as his great-grandfather David had been.
But for David's sake the Lord his God gave Abijah a son to rule after him in Jerusalem and to keep Jerusalem secure. 1
References for 1 Kings 15:4
15.4 1 K 11.36.
The Lord did this because David had done what pleased him and had never disobeyed any of his commands, except in the case of Uriah the Hittite. 2
References for 1 Kings 15:5
15.5 2 S 11.1-27.
The war which had begun between Rehoboam and Jeroboam continued throughout Abijah's lifetime. 3
References for 1 Kings 15:6
15.6 2 Ch 13.3-21.
And everything else that Abijah did is recorded in [The History of the Kings of Judah.]