Meanwhile Jeroboam had sent an ambush round to come at them from behind, so that his men were in front of Judah and the ambush behind.
In context
11Morning by morning and evening by evening they burn to Yahweh the burnt offerings and the fragrant incense; they set out the rows of bread on the clean table, and light the golden lampstand with its lamps every evening. We keep the charge of Yahweh our God — but you have abandoned him. 12See, God is with us, at our head, and his priests with the trumpets of alarm, to sound the alarm against you. Israelites, do not fight against Yahweh, the God of your ancestors: you will not succeed.” 13Meanwhile Jeroboam had sent an ambush round to come at them from behind, so that his men were in front of Judah and the ambush behind. 14Judah turned and found the battle both in front of them and behind. They cried out to Yahweh, while the priests blew the trumpets 15and the men of Judah raised the war cry. And as the men of Judah raised the cry, God struck Jeroboam and all Israel down before Abijah and Judah.