מלכים ב, פרק ט״ו, פסוק י׳

A rebellion against a king reaches its violent end not in the shadows, but in the clear view of the public square. The open nature of the attack leaves no doubt about the sudden shift in power.

Shallum son of Jabesh initiated a direct uprising against the monarch [ביאור שטיינזלץ]. Rather than relying on a secretive plot, the conspiracy reached its climax through a highly visible assassination. The fatal strike was delivered right in front of the nation, making the killing an undeniable public event [רש״י, ביאור שטיינזלץ]. The act took place directly opposite the gathered masses, ensuring complete exposure [מצודת ציון, רד״ק]. By executing the king openly and in full view of the people, the rebellion achieved its ultimate goal, leading directly to an immediate change in leadership.