II Chronicles 20:20

The fulfilment of the divine promise. - Ch2 20:20. On the next morning the assembled men of Judah marched, in accordance with the words of the prophet, to the wilderness of Tekoa. As they marched forth, Jehoshaphat stood, probably in the gate of Jerusalem, where those about to march forth were assembled, and called upon them to trust firmly in the Lord and His prophets (האמינוּ and תּאמנוּ, as in Isa 7:9). After he had thus counselled the people (אל יוּעץ, shown himself a counsellor; cf. Kg2 6:8), he ordered them to march, not for battle, but to assure themselves of the wonderful help of the Lord. He placed singers of the Lord (ל before יהוה as a periphrasis for the genitive), singing praise in holy ornaments, in the marching forth before the army, and saying; i.e., he commanded the Levitic singers to march out before the army, singing and playing in holy ornaments (להדרת־ק, clad in holy ornaments, = בּהדרת in Ch1 16:29; cf. Ew. 217, a), to praise the Lord for the help He had vouchsafed.

We have here the foregoing prayer answered and the foregoing promise performed, in the total overthrow of the enemies' forces and the triumph (for so it was rather than a victory) of Jehoshaphat's forces over them. I. Never was army drawn out to the field of battle as Jehoshaphat's was. He had soldiers ready prepared for war (Ch2 17:18), but here is no notice taken of their military equipment, their swords or spears, their shields or bows. But Jehoshaphat took care, 1. That faith should be their armour. As they went forth, instead of calling them to handle their arms, and stand to them, to keep ranks, observe orders, and fight valiantly, he bade them believe in the Lord God and give credit to his word in the mouth of his prophets, and assured them that they should prosper and be established, Ch2 20:20. That is true courage which faith inspires a man with; nor will any thing contribute more to the establishing of the heart in shaking times than a firm belief of the power, and mercy, and promise of God. The heart is fixed that thus trusteth in the Lord, and is kept in perfect peace. In our spiritual conflicts, this is the victory, this is the prosperity, even our faith. 2. That praise and thanksgiving should be their vanguard, Ch2 20:21. Jehoshaphat called a council of war, and it was resolved to appoint singers to go out before the army, to charge in the front, who had nothing else to do but to praise God, to praise his holiness, which is his beauty, to praise him as they did in the temple (that beauty of holiness) with that ancient and good doxology which eternity itself will not wear thread-bare, Praise the Lord; for his mercy endureth for ever. By this strange advance towards the field of battle, Jehoshaphat intended to express his firm reliance upon the word of God (…

20:20-21 The song of the appointed singers replaced a battle cry. The prophets were Jahaziel (20:14-17) and the Levitical musicians (20:21), whose musical praise for the battle march was a prophecy, a declaration that God was at the head of the army.