1 Samuel 18:27-30

David arose and went, along with his men, and killed two hundred of the Philistines. And David brought their foreskins, which were given in full number to the king, that he might become the king’s son-in-law. And Saul gave him his daughter Michal for a wife. But when Saul saw and knew that the LORD was with David, and that Michal, Saul’s daughter, loved him, Saul was even more afraid of David. So Saul was David’s enemy continually. Then the commanders of the Philistines came out to battle, and as often as they came out David had more success than all the servants of Saul, so that his name was highly esteemed.