So on the day of the battle there was neither sword nor spear found in the hand of any of the people with Saul and Jonathan, but Saul and Jonathan his son had them.
Here, 1. Samuel departs in displeasure. Saul has set up for himself, and now he is left to himself: Samuel gat him from Gilgal (Sa1 13:15), and it does not appear that he either prayed with Saul or directed him. Yet in going up to Gibeah of Benjamin, which was Saul's city, he intimated that he had not quite abandoned him, but waited to do him a kindness another time.
Commenting on 1 Samuel 13:15-23
So it came to pass in the day of battle,.... When that drew near, and they were called to it, and obliged to fight or flee, or surrender: that there were neither sword nor spear found in the hand of any of the people that were with Saul and Jonathan: which was not owing to their leaving them behind in the camp, or casting them...
So it came to pass in the day of battle, that there was neither sword nor spear found in the hand of any of the people that [were] with Saul and Jonathan: but with Saul and with Jonathan his son was there found. (n) To declare that the victory only came from God, and not by their force.