2 Chronicles 13:12-15

Look, God and his priests are with us at our head. The trumpets are ready to sound the charge against you. Israelites, don’t fight against the LORD God of your ancestors, for you will not succeed.”  Now Jeroboam had sent an ambush  around to advance from behind them. So they were in front of Judah, and the ambush was behind them. Judah turned and discovered that the battle was in front of them and behind them, so they cried out to the LORD.  Then the priests blew the trumpets, and the men of Judah raised the battle cry. When the men of Judah raised the battle cry, God routed Jeroboam and all Israel before Abijah and Judah.