Marching into battle typically requires armor, weapons, and tactical formations. Yet, a completely different and highly unusual strategy unfolds here, one that abandons standard military preparation to express absolute and exclusive trust in God [רלב״ג, ביאור שטיינזלץ]. King Jehoshaphat acts against conventional advice by first consulting the general public rather than relying solely on military leaders [מצודת דוד, מלבי״ם].
Following this consultation, the king places a choir and orchestra at the very front of the camp, marching ahead of the armed and equipped soldiers [מצודת ציון]. These musicians are appointed to sing to God, honoring Him as the Creator of the world, and to praise Him for His direct involvement and care for Israel [מלבי״ם, ביאור שטיינזלץ]. Their song is directed toward a holy splendor. This concept either refers to God Himself, who is magnificent in His holiness and reveals His glorious presence before them [מצודת דוד, מלבי״ם], or it describes the character of the performance itself, which is sung with deep reverence, awe, and majestic holiness [ביאור שטיינזלץ].
As they lead the army, the choir sings words of gratitude for His eternal kindness. Notably, this praise is offered before any actual victory is achieved. One approach explains that the people are thanking God in advance for the salvation already guaranteed to them through a prophetic promise [רלב״ג]. Another perspective highlights the initiative of the people. Although they had a promise of victory, they chose to awaken themselves to offer early thanks, understanding that this proactive gratitude would stir heavenly mercy and amplify their salvation [חומת אנך].
The specific focus of their song on God's eternal kindness carries a deeper message. It teaches that when God goes to war against Israel's enemies, His actions do not stem from a basic desire to cause harm. Instead, His intervention is driven entirely by His goal to do good for Israel, rooted in His everlasting kindness toward them [מלבי״ם].