2 Chronicles 20:21

21 And he gave counsel to the people, and he ordained the singers of the Lord, that they should praise him in their companies, and that they should go before the host, and say with according voice, Acknowledge ye to the Lord, for he is good; for his mercy is without end. (And he consulted with the people, and he ordained the singers of the Lord, to praise him in their companies, and to go before the army, and to sing together with a loud voice, Praise ye the Lord, for he is good; for his love endureth forevermore.)

2 Chronicles 20:21 Meaning and Commentary

2 Chronicles 20:21

And when he had consulted with the people
His principal officers, in what order they should march, and in what manner they should form themselves, when they met the enemy, and how they should conduct as if they were to engage: he appointed singers unto the Lord;
to sing his praise, and give him glory, as if the victory was already completed, it being so sure: and that should praise the beauty of holiness, as they went out before
the army;
that is, praise God, who is glorious in holiness, whose beauty lies in his holiness, and who is holy in all his ways and works: and to say, praise the Lord, for his mercy endureth for ever;
with which they were to conclude their songs of praise, as David did, and whose songs they might sing; see ( Psalms 136:1-26 ) .

2 Chronicles 20:21 In-Context

19 And the deacons of the sons of Kohath, and of the sons of Korah (And the Levites of the Kohathites, and of the Korahites), praised the Lord God of Israel with [a] great voice on high.

20 And when upon the morrow they had risen early, they went out by the desert of Tekoa; and when they had gone forth, Jehoshaphat stood in the midst of them, and said, Judah, and all the dwellers of Jerusalem, hear ye me; believe ye in the Lord your God, and ye shall be secure; believe ye to his prophets, and all prosperities shall come to you. (And when they had risen early the next morning, they went out by the wilderness of Tekoa; and when they had gone forth, Jehoshaphat stood in their midst, and said, Judah, and all the inhabitants of Jerusalem, listen ye to me; believe ye in the Lord your God, and ye shall be secure; believe ye his prophets, and ye shall prosper.)

21 And he gave counsel to the people, and he ordained the singers of the Lord, that they should praise him in their companies, and that they should go before the host, and say with according voice, Acknowledge ye to the Lord, for he is good; for his mercy is without end. (And he consulted with the people, and he ordained the singers of the Lord, to praise him in their companies, and to go before the army, and to sing together with a loud voice, Praise ye the Lord, for he is good; for his love endureth forevermore.)

22 And when they began to sing praisings, the Lord turned the ambushments of them against themselves, that is, of the sons of Ammon, and of Moab, and of the hill of Seir, which went out to fight against Judah; and they were slain. (And when they began to sing their praises, the Lord turned their enemies? ambushes back against themselves, that is, against the Ammonites, and the Moabites, and those of the hill country of Seir, yea, all who went to fight against Judah; and they were killed.)

23 For why the sons of Ammon and of Moab rose together against the dwellers of the hill of Seir, to slay, and to do away them; and when they had done this thing in work, they were then also turned against themselves, and they fell down together by wounds, each slaying (the) other. (For the Ammonites and the Moabites rose up together against the inhabitants of the hill country of Seir, to kill them, and to do them away; and when they had done this thing, then they turned against each other, and they fell down wounded together, each killing the other.)