NET
20 Saul and all the army assembled and marched into battle, where they found the Philistines in total panic killing one another with their swords.
Darby
20 And Saul and all the people that were with him were called together, and they came to the battle; and behold, every man's sword was against his fellow, a very great confusion.
KJV
20 And Saul and all the people that [were] with him assembled themselves, and they came to the battle: and, behold, every man's sword was against his fellow, [and there was] a very great discomfiture.