1 Samuel 18:27-30

he and his men went out and killed 200 Philistines. Then David fulfilled the king’s requirement by presenting all their foreskins to him. So Saul gave his daughter Michal to David to be his wife. When Saul realized that the LORD was with David and how much his daughter Michal loved him, Saul became even more afraid of him, and he remained David’s enemy for the rest of his life. Every time the commanders of the Philistines attacked, David was more successful against them than all the rest of Saul’s officers. So David’s name became very famous.