One day an evil spirit from the Lord took control of Saul. He was sitting in his house with his spear in his hand, and David was there, playing his harp.
The Philistine armies would come and fight, but in every battle David was more successful than any of Saul's other officers. As a result David became very famous.
So David and his men went to Keilah and attacked the Philistines; they killed many of them and took their livestock. And so it was that David saved the town.