1 Samuel 18:20-21

Now Saul’s daughter Michal was in love with David, and when they told Saul about it, he was pleased. “I will give her to him,” he thought, “so that she may be a snare to him and so that the hand of the Philistines may be against him.” So Saul said to David, “Now you have a second opportunity to become my son-in-law.”