Jamieson, Fausset and Brown on 2 Chronicles 20:20-21

20-21. as they went forth, Jehoshaphat stood ... Hear me, O Judah, and ye inhabitants of Jerusalem--probably in the gate of Jerusalem, the place of general rendezvous; and as the people were on the eve of setting out, he exhorted them to repose implicit trust in the Lord and His prophet, not to be timid or desponding at sight of the enemy, but to remain firm in the confident assurance of a miraculous deliverance, without their striking a single stroke.