שמואל ב, פרק י״ז, פסוק ב׳

A brilliant military strategy often relies on striking when the enemy is most vulnerable, aiming for a swift resolution rather than a prolonged war. Ahithophel’s advice to Absalom is built on this premise, proposing a sudden, targeted strike that would end the rebellion quickly and avoid widespread bloodshed. The plan hinges on a calculated sequence of surprise, panic, and isolation.

Ahithophel intends to attack immediately while David is exhausted and deeply discouraged. This state of vulnerability, marked by despair and a faint heart [מצודת ציון, ביאור שטיינזלץ], is acute because David was driven from his throne just that very day. He has not yet had a moment to regroup, organize his forces, or formulate a plan of action [מצודת דוד]. To maximize this advantage, Ahithophel proposes a sudden night ambush. Striking under the cover of darkness would catch David completely unprepared, creating overwhelming shock and terror [מלבי״ם, מצודת דוד].

The sheer panic of a midnight raid would cause David's supporters to scatter in every direction. Without time to mount a defense, his men would flee rather than stay and fight [מצודת דוד]. This mass desertion paves the way for the ultimate goal of the strategy: isolating the king. By dispersing the camp, the attackers could focus entirely on killing David alone. This surgical strike eliminates the need for a massive battle and spares the lives of David's followers.

Beneath the tactical brilliance of this plan lies a deeply personal motive. Ahithophel specifically asks to lead the strike and kill the king himself. On a practical level, this prevents the highly improper scenario of Absalom chasing down and murdering his own father. However, Ahithophel also volunteers for this assassination because he views himself as the blood avenger for his son-in-law, Uriah [מלבי״ם].