A fierce military campaign can sometimes end not with a decisive victory, but with an abrupt halt. Saul's pursuit of the enemy comes to a sudden close as he abandons the chase, leaves his opponents alone, and returns home [מצודת דוד, ביאור שטיינזלץ].
This sudden retreat is a direct result of the preceding events, most notably God's silence when He was consulted. On a basic level, without an explicit divine command to press forward with the war, Saul simply chooses to stop [ביאור שטיינזלץ]. Yet, the silence carries a heavier weight. Saul interprets the lack of an answer as a clear sign that God is unwilling to deliver the Philistines into his hands at that moment. Feeling rebuked, the king recognizes that he currently lacks the merit required to secure a victory [אברבנאל]. There is also a lingering unease; Saul fears that even though Jonathan was spared from death, a shadow of guilt from the broken oath still rests upon them [רד״ק].
Alongside these spiritual concerns, a practical reality forces the end of the conflict. The long hours of the night spent investigating Jonathan's actions create a significant delay. While the camp is occupied with this internal crisis, the Philistines seize the opportunity to safely withdraw back into their own territory [רד״ק].
This moment acts as an interim summary of Saul's journey as a leader [ביאור שטיינזלץ]. It serves as a stark reminder that no matter what plans a king might make to continue fighting, it is ultimately God's will that dictates the final course of events [אברבנאל].