The city of God enjoys absolute divine protection, ensuring its stability through any upheaval. Because God dwells directly within Jerusalem, the city can never collapse. Even if the surrounding mountains tremble, Mount Zion will remain firmly in place [אבן עזרא]. Ultimately, God will restore the city to its rightful foundation, guaranteeing that it will never again fall into the hands of an enemy [מאירי].
This divine defense operates in distinct stages. Initially, it acts as a shield, removing potential harm and preventing damage from striking the city. Following this protective phase, God provides active, direct help to defeat the enemies [אלשיך].
The timing of this direct intervention is set for the break of dawn. Literally, this refers to the early hours just before the light shines [אבן עזרא, שטיינזלץ, מאירי]. It can also represent a constant, daily renewal of support [אבן עזרא], and the specific timing of dawn may mark either the very beginning of a battle or its conclusion [מאירי].
Beyond the literal morning, the primary approach among commentators views the dawn as a powerful symbol for the ultimate future redemption [רש״י, מצודת דוד]. The struggles of war and the deep darkness of exile are compared to the night. When salvation finally arrives, it breaks through the dark just like the morning light, bringing a complete and lasting redemption [רד״ק, אלשיך].