2 Chronicles 13:15 - Joseph Benson’s Commentary on the Old and New Testaments

Then the men of Judah gave a shout In confidence of victory, the priests animating them by sounding the trumpets, and giving them assurance of God's presence with them. To the cry of prayer they added the shout of faith, and so became more than conquerors. God smote Jeroboam and all Israel He struck him and his army with such terror and amazement, that, it appears, they could not strike a stroke, but fled with the greatest precipitation imaginable, and the conquerors gave no quarter; so that they put to the sword five hundred thousand chosen men; more (it is said) than ever we read of in any history to have been killed in one battle. But the battle was the Lord's; who would thus chastise the idolatry of Israel, and own the house of David. But see the sad effects of division! It was the blood of Israelites which was thus shed like water by Israelites, while the heathen, their neighbours, to whom the name of Israel had formerly been a terror, cried, Aha, so would we have it.