2 Chronicles 13:5-7, 17

Don’t you realize that the LORD, the God of Israel, made a lasting covenant with David, giving him and his descendants the throne of Israel forever? Yet Jeroboam son of Nebat, a mere servant of David’s son Solomon, rebelled against his master. Then a whole gang of scoundrels joined him, defying Solomon’s son Rehoboam when he was young and inexperienced and could not stand up to them.

Abijah and his army inflicted heavy losses on them; 500,000 of Israel’s select troops were killed that day.