Read 2 Samuel 21:15 Using Other Translations
Moreover the Philistines had yet war again with Israel; and David went down, and his servants with him, and fought against the Philistines: and David waxed faint.
There was war again between the Philistines and Israel, and David went down together with his servants, and they fought against the Philistines. And David grew weary.
Once again the Philistines were at war with Israel. And when David and his men were in the thick of battle, David became weak and exhausted.