A sudden cry of destruction is destined to shatter the quiet of the enemies' homes, exposing their hidden plots and forcing them to confront their own guilt. A terrible sound of ruin will erupt from their houses [מצודת דוד]. This outcry will happen at the exact moment God brings enemy armies against them [מלבי״ם, מצודת ציון, ביאור שטיינזלץ]. The invasion will strike without any warning, leaving the people with absolutely no time to prepare or defend themselves [מצודת דוד]. It is exactly this sheer, shocking suddenness of the disaster that will trigger their great cry of despair [רד״ק].
The reason for this severe punishment is rooted in the imagery of a hunt. The enemies are compared to hunters who dig a deep pit to capture a wild animal, carefully hiding nets and traps along its usual path to force it to walk directly into the snare [מלבי״ם, מצודת ציון, ביאור שטיינזלץ]. The intense repetitive language of this hunting metaphor highlights the cruelty and power of their scheme [מצודת דוד]. In reality, these hidden traps represent the malicious plans the enemies devised against the prophet [מצודת דוד].
There are different views regarding the exact nature of this plot. One perspective suggests it was a physical assassination attempt, where the pit and traps symbolize a deadly poison they intended to feed him [רד״ק]. Another approach views the attack as character assassination and false accusation. According to this view, they spread rumors that he had sinned with a married woman, using the metaphor of a deep pit to hint at immorality [רש״י].
Beyond the immediate terror, this cry carries a deeper meaning. When the enemy army suddenly descends upon them, the people will finally recognize the justice of their punishment. The loud cry echoing from their homes will serve as a public confession. They will admit that this disaster has fallen upon them because of their conspiracy against the prophet. Through this painful realization, it will become perfectly clear to everyone that all the schemes and slander directed at him were absolute lies [מלבי״ם].