King David massacres the Philistines and the Moabites. Image from BibleStudyOutlines.org
It also should be noted that those 700 horsemen is a disputed number, because in 1 Chronicles 18:4, it says David actually took 7,000 horsemen. Maybe it's a recording error, but that just goes to show the problems inherent to these ancient documents.
David then goes on to slay the Syrians, to the tune of 22,000 men!
From all his conquests, he gathered plenty of loot, including the golden shields of the servants of Hadadezar.
So, way to go David! At this point of the Bible, he's really kicking ass!