2 Chronicles 20:21 - Joseph Benson’s Commentary on the Old and New Testaments

When he had consulted with the people That is, with the elders and heads of the tribes, who represented the rest. He called a council of war, and it was resolved to appoint singers to go out before the army, who had nothing 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 good old doxology, which eternity itself,” as Henry says, “will not wear threadbare, Praise the Lord, for his mercy endureth for ever.” By this strange advance to the field of battle, Jehoshaphat showed his firm reliance on the word of God, which enabled him to triumph before the battle, to animate his own men, and confound the enemy.