דברים, פרק כ׳, פסוק ד׳

In the midst of military preparations, the focus suddenly shifts away from physical strength and battlefield tactics toward absolute reliance on Divine providence. Soldiers are cautioned against placing their trust in their own natural bravery or viewing themselves as war heroes; instead, they must direct their hearts entirely toward God [הטור הארוך]. This reliance forms the essential difference between Israel and other nations. While enemies depend on the strength of flesh and blood—much like the Philistines who relied on Goliath and fell alongside him—Israel achieves victory exclusively through the power of God [רש״י, תורה תמימה, אדרת אליהו, מלבי״ם]. The dual mention of God's name in this context reflects a blend of His attributes: His mercy, which is intended to save Israel, alongside His strict justice, which is directed to destroy their enemies [אור החיים].

The assurance that God walks alongside the army raises a conceptual challenge, as physical movement cannot literally apply to a Being whose glory fills the entire earth [שפתי חכמים]. The primary approach among commentators is that this refers to the Ark of the Covenant, which contained the shattered pieces of the original tablets and accompanied the soldiers into the battlefield [רש״י, העמק דבר, תורה תמימה, אדרת אליהו]. Alternatively, some maintain that the promise refers not to the physical Ark, but to God's actual, immediate presence dwelling within the military camp [שד״ל]. In either case, the core message is one of precise, personal providence advancing ahead of the troops [העמק דבר, נתינה לגר].

A distinct separation is made between God fighting the battle and God saving the soldiers, highlighting a twofold miracle. The promise of fighting ensures general military success and the destruction of the enemy. However, the natural reality of warfare dictates that even a victorious army suffers casualties. Therefore, the promise of salvation guarantees a highly unusual miracle of personal protection for every individual soldier, ensuring that not a single person will die in combat [הטור הארוך, רבנו בחיי, אור החיים, ביאור יש״ר, העמק דבר]. This expectation of zero casualties explains why Joshua cried out so bitterly following the losses at the battle of Ai, as no one was supposed to fall in a divinely commanded war [רבנו בחיי, ביאור יש״ר].

Other perspectives offer different explanations for this dual promise. It may reflect varying levels of spiritual merit: if the Israelites are entirely worthy, God actively fights on their behalf; if their merit is lacking but the enemy's guilt is not yet complete, God will at least save them from the hands of their oppressors [רלב״ג]. Another view suggests a division of threats. While the fighting is directed against human enemies, the salvation protects the soldiers from the natural hazards of the wilderness and the battlefield, such as snakes, scorpions, and harmful spirits [מלבי״ם].

This absolute guarantee of survival is delivered by the priest, who speaks purely from a place of deep faith and reverence for God. Immediately afterward, the military officers address the troops using the terms of the natural world, acknowledging the ordinary reality where men might die in combat, and thus they dismiss those whose minds are distracted [הטור הארוך, ביאור יש״ר]. Finally, the sequence of these divine reassurances perfectly mirrors the earlier warnings against fear. The reminder of God's presence counters the weakness of heart felt while the soldiers are still at home; the promise that He marches with them addresses the fear of heading to the front lines; the assurance that He will fight prevents panic at the onset of the clash; and the guarantee of personal salvation dispels any dread during the heat of the battle itself [אדרת אליהו].