And when he had consulted with the people, he appointed singers unto the LORD, and that should praise the beauty of holiness, as they went out before the army, and to say, Praise the LORD; for his mercy endureth for ever.
He appointed sinners ... that should praise ... as they went out before the army. Having arranged the line of procession, gave the signal to move forward, when the Levites, leading the van with their musical instruments, and singing Psalms 136:1-26, the people went on, not as an army marching against an enemy, but returning in joyful triumph after a victory.