Sulpicius Severus

For, as a result of the king’s sin [Saul’s offering of the sacrifice], fear had pervaded the whole army. The camp of the enemy, which was lying at no great distance, showed them how real the danger was, and no one had the courage to think of going out to battle: most had absconded to the marshes. For besides the lack of courage on the part of those who felt that God was alienated from them on account of the king’s sin, the army was in the greatest need of iron weapons; so much so that nobody, except Saul and Jonathan his son, is said to have possessed either sword or spear. For the Philistines, as conquerors in the former wars, had deprived the Hebrews of the use of arms, and no one had had the power of forging any weapon of war or even making any implement for rural purposes.

In these circumstances [with few weapons and Saul’s fearful army], Jonathan, with an audacious design and with his armor bearer as his only companion, entered the camp of the enemy, and having slain about twenty of them, [he] spread a terror throughout the whole army. And then, through the appointment of God, taking themselves to flight, they neither carried out orders nor kept their ranks but placed all the hope of safety in flight. Saul, perceiving this, hastily drew forth his men, and pursuing the fugitives, obtained a victory.