2 Chronicles 13:17 in the King James Version
And Abijah and his people slew them with a great slaughter: so there fell down slain of Israel five hundred thousand chosen men.
Context
16 The children of Israel fled before Judah, and God delivered them into their hand.
17 Abijah and his people killed them with a great slaughter, so five hundred thousand chosen men of Israel fell down slain.
18 Thus the children of Israel were brought under at that time, and the children of Judah prevailed, because they relied on the LORD, the God of their fathers.