1 Samuel 18:20-21, 26-27

Meanwhile, Saul’s daughter Michal was in love with David. When Saul was told of this, he rubbed his hands in anticipation. “Ah, a second chance. I’ll use Michal as bait to get David out where the Philistines will make short work of him.” So again he said to David, “You’re going to be my son-in-law.”

On receiving this message, David was pleased. There was something he could do for the king that would qualify him to be his son-in-law! He lost no time but went right out, he and his men, killed the hundred Philistines, brought their evidence back in a sack, and counted it out before the king—mission completed! Saul gave Michal his daughter to David in marriage.