The burial of a great military commander transforms into a moment of profound national mourning, guided directly by King David himself. Standing right beside the gravesite in Hebron, the king's tears reflect a complex mix of personal grief, moral outrage, and a critical political message [מצודת ציון, רד״ק, ביאור שטיינזלץ].
The king's weeping stems first from genuine pain over the tragic loss and the brutal nature of the murder. He mourns the death of a major leader in Israel, a famous and significant figure since the days of Saul, who had recently formed an alliance with him [רלב״ג, ביאור שטיינזלץ]. Weeping directly beside the grave serves as a physical expression of shock over the spilled innocent blood, recognizing that a land stained by such a crime requires deep spiritual atonement [מלבי״ם].
Beyond personal sorrow, the king's tears and his choice to fast that day are driven by urgent public and political concerns. Because Abner had previously crowned a rival, Ish-bosheth, and participated in Saul's past persecutions against David, there is a real danger that the public might suspect David of ordering the assassination. If left unchecked, this suspicion could deter the nation from accepting David as their ruler [רלב״ג, אלשיך].
By crying and lamenting openly, the king actively dismantles these suspicions. He proves to the public that he never considered the commander a rebel deserving of death, but rather acknowledges his loyalty. The king's public display frames the fallen leader as a righteous man struck down by wicked individuals, possibly even serving as an atonement for the sins of the generation [אלשיך]. As the people join their king in weeping, they express both their heavy grief for the lost military leader [ביאור שטיינזלץ] and their deep connection to the king's pain, proving that he has successfully cleared his name of any involvement in the crime [אלשיך].