1 Samuel 14:14-16

They killed some twenty men in all, and their bodies were scattered over about half an acre. Suddenly, panic broke out in the Philistine army, both in the camp and in the field, including even the outposts and raiding parties. And just then an earthquake struck, and everyone was terrified. Saul’s lookouts in Gibeah of Benjamin saw a strange sight—the vast army of Philistines began to melt away in every direction.