Then David sent messengers to say to Ish-bosheth son of Saul, ‘Give me back my wife Michal. I was engaged to her for the price of a hundred Philistine foreskins.’
David and his men went out and killed two hundred Philistines. He brought their foreskins and presented them as full payment to the king to become his son-in-law. Then Saul gave his daughter Michal to David as his wife.