1 Kings 15:6-7
15:6 Rehoboam and Jeroboam were continually at war with each other throughout Abijah’s lifetime.
15:7 The rest of the events of Abijah’s reign, including all his accomplishments, are recorded in the scroll called the Annals of the Kings of Judah. Abijah and Jeroboam had been at war with each other.
1 Kings 15:32
15:32 Asa and King Nadab of Israel were continually at war with each other.