Then panic1 struck the whole army--those in the camp and field, and those in the outposts and raiding2 parties--and the ground shook. It was a panic sent by God.
References for 1 Samuel 14:15
Saul's lookouts3 at Gibeah in Benjamin saw the army melting away in all directions.
References for 1 Samuel 14:16
Then Saul said to the men who were with him, "Muster the forces and see who has left us." When they did, it was Jonathan and his armor-bearer who were not there.