II Chronicles 13:5-7, 17

Should you not know that the LORD God of Israel gave the dominion over Israel to David forever, to him and his sons, by a covenant of salt? Yet Jeroboam the son of Nebat, the servant of Solomon the son of David, rose up and rebelled against his lord. Then worthless rogues gathered to him, and strengthened themselves against Rehoboam the son of Solomon, when Rehoboam was young and inexperienced and could not withstand them.

Then Abijah and his people struck them with a great slaughter; so five hundred thousand choice men of Israel fell slain.