1 Samuel 18:25-27

he told them, “Tell David that all I want for the bride price is 100 Philistine foreskins! Vengeance on my enemies is all I really want.” But what Saul had in mind was that David would be killed in the fight. David was delighted to accept the offer. Before the time limit expired, 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.