A heavy disaster is about to strike the nation, and the prophet is called to express profound physical and vocal sorrow. Rather than experiencing joy, he is commanded to cry out and wail loudly [רד״ק, מצודת דוד]. The cause for this intense grief is a destructive sword that will show no mercy and make no class distinctions. It is destined to strike the entire population, cutting down everyone from the ordinary citizen to the highest princes and kings [רש״י, שטיינזלץ].
The nature of this devastating sword is understood in a few ways. Some connect the prophecy to specific, tragic historical events, such as the death of King Josiah in battle or the brutal slaughter of King Zedekiah's sons [רד״ק, אברבנאל]. However, another approach views this not merely as the weapon of a foreign invader, but as the blade of civil war. According to this perspective, internal conflicts and mutual killing tore the nation apart, causing more destruction from within than any outside enemy [מלבי״ם].
The impending doom created a suffocating environment for the people. One interpretation suggests that the nation suffered from a paralyzing fear of the sword long before it actually struck [רד״ק, מנחם המובא ברש״י]. In the context of civil unrest, this dread was fueled by the nation's own leaders and princes, who had become a source of terror by turning their weapons against their own people [מלבי״ם]. A different approach understands this atmosphere not as psychological fear, but as a physical gathering. In this view, coalitions of foreign nations assembled and massed their swords around Israel, ready to attack [רש״י, מצודת דוד, מצודת ציון].
Overwhelmed by the sheer scale of the disaster, the prophet is commanded to strike his thigh with his hand. This physical action serves as a clear, visceral expression of deep sorrow, mourning, and lamentation [רש״י, מצודת דוד, אברבנאל]. Beyond a simple display of grief, this gesture carries a profound symbolic meaning. The thigh is the exact place where a person straps their weapon. Therefore, striking the thigh highlights a tragic irony. The prophet is mourning the destructive power of Israel's own sword, the very weapon hanging at their side that ultimately led to their ruin [מלבי״ם].