A majestic display of divine power unfolds as all of creation reacts with deep shock to God's anger. The very foundations of the natural world tremble, setting the stage for two distinct ways to understand this cosmic upheaval: as a metaphor for the defeat of human enemies, or as a reference to monumental historical events and physical phenomena.
The primary approach among commentators views this violent shaking as a metaphor for the total collapse of the enemies of David and Israel. By nature, the earth and its mountains are symbols of absolute stability. Yet, even these immovable forces are shaken, illustrating that enemies who seem as strong and rooted as mountains will ultimately tremble before God's wrath [אבן עזרא, מאירי]. Within this metaphor, the quaking earth represents the common people of the enemy nations, while the deep foundations of the mountains symbolize their high-ranking leaders, such as Pharaoh and his officers [מצודת דוד].
In contrast to the metaphorical view, other commentators connect this massive upheaval to literal historical events and ancient miracles. This shaking of the earth recalls moments of intense divine intervention, such as the devastating plagues brought upon Pharaoh and Egypt [רש״י, מאירי], the awe-inspiring revelation at Mount Sinai [ביאור שטיינזלץ], or the catastrophic earthquake that destroyed Sodom [אלשיך]. Another perspective takes the description as an immediate physical reality, understanding it as an actual earthquake designed to swallow enemies alive. In this scenario, the mountains split open, exposing the fiery depths of God's anger to consume those who oppose Him [מלבי״ם].
The physical descriptions of this turmoil reveal a clear progression in intensity. The disturbance begins with a light trembling [ביאור שטיינזלץ], escalates into a violent tossing [מצודת ציון, מאירי], and finally erupts into a massive, earth-shattering quake [מלבי״ם]. Ultimately, the catalyst for this escalating destruction is divine retribution. All of nature violently convulses at the exact moment God becomes angry, stepping forward to avenge His people and strike down their enemies [רש״י, מצודת דוד].