David’s voice echoes across the camp, directed specifically at the kingdom's highest-ranking official and army commander, Abner. He addresses the commander directly rather than through messengers due to Abner's high status and the intensely public nature of the king's security [מלבי״ם, אברבנאל]. David begins with words of praise, acknowledging Abner as an important and mighty hero in Israel so as not to dismiss his value [אלשיך]. However, this praise is actually used to amplify the severity of the commander's failure. Precisely because of his unmatched greatness and rank, his guilt for failing in his duty is all the heavier [מצודת דוד, אברבנאל].
As the head of the army, Abner holds the ultimate responsibility for protecting the king. This does not mean he was expected to stay awake and physically stand guard himself, as it is normal for a commander to sleep and rely on his soldiers. Rather, his absolute duty was to organize the watches and ensure guards were securely stationed around the royal camp [אברבנאל, אלשיך]. The shocking reality that an outsider easily infiltrated the camp and reached the king's bed exposes a massive security failure. Either Abner was entirely negligent and failed to post guards, or the guards he assigned completely abandoned their duty and fell asleep [מלבי״ם, אברבנאל].
Throughout his reprimand, David repeatedly mentions the king, which serves as a subtle reminder that this is already the second time Abner has failed to protect his leader, recalling a previous encounter in a cave [אלשיך]. David highlights the sheer danger of the situation, warning of the disaster that nearly occurred, as an intruder had just entered the camp with the clear intention of killing the king [מצודת דוד, ביאור שטיינזלץ]. The potential consequences of this negligence were fatal. Had the king been murdered in his sleep, royal law would have condemned Abner and his men to death for abandoning their post, assuming they had not already been slaughtered in their beds by the assassin [אברבנאל].