2 Chronicles 13:18 - Joseph Benson’s Commentary on the Old and New Testaments

Thus the children of Israel were brought under at that time And had not the determinate counsel of God been otherwise, surely so great a blow would have brought them back to the house of David. And Judah prevailed, because they relied on the God of their fathers It was not by their own valour that they obtained this great victory, but by their relying on God, their depending on his power to help them, and their committing themselves and their cause to him.