A cry of anguish and a prophecy of ruin echo through the prophet's vision, warning of a deadly weapon rapidly approaching the city. This destructive force is envisioned as a lethal, gleaming blade ready to execute punishment. The prophet cries out in a repetitive warning about this approaching threat. The primary approach among commentators is that this repetition reflects a style of lamentation and deep sorrow, much like a person wailing bitterly over an impending disaster [מצודת דוד, רד"ק]. Alternatively, this dual warning serves as a historical hint to two distinct waves of destruction that will strike the people. The first strike represents the army of the Babylonian king destroying the city, while the second points to the Ammonites, who will later attack the remaining survivors through Ishmael son of Nethaniah, the assassin of Gedaliah [רש"י, רד"ק].
The weapon is characterized in two distinct ways. Commentators agree that it is thoroughly sharpened, designed to slaughter quickly and efficiently. Additionally, it is described as polished and gleaming. Most explain this to mean that all rust has been removed so the metal shines brightly, striking terror into anyone who looks upon it [מצודת דוד, מצודת ציון, רד"ק, ביאור שטיינזלץ]. Another perspective suggests this description simply means the weapon is fully drawn from its sheath, ready for immediate use [רש"י].
A profound interpretation views these combined descriptions as a metaphor for a sophisticated political and military maneuver executed by Nebuchadnezzar, the king of Babylon [מלבי"ם]. According to this approach, the repetitive warning points to a single weapon with two very different sides. One edge is sharp and meant for slaughter, while the other is smooth and polished, its sharpness intentionally removed so it can be gripped like a handle. This serves as a striking historical metaphor for the siege of Jerusalem. When the Babylonian king realized the people were united within the city walls and could not be easily defeated, he employed a tactic of deception. He pretended to relax the siege and appeared to seek peace, an act compared to presenting the smooth, non-threatening side of the blade. This illusion of safety gave the residents of Jerusalem a false sense of security, which tragically led to a bloody civil war within the city. Only after the people had weakened and destroyed each other from the inside did the king of Babylon seize the opportunity. Grasping the situation much like holding the smooth side of the weapon, he then turned its sharp, lethal edge against the city, easily conquering it and massacring its inhabitants.