2 Samuel 3:14
And David sent messengers to Ishbosheth Saul's son saying, "Deliver me my wife Michal which I married with a hundred foreskins of the Philistines."
1 Samuel 18:27
And shortly after that, David arose with his men, and went, and slew of the Philistines, two hundred men; and brought their foreskins, and satisfied the king thereof to be his son-in-law. And so Saul gave him Michal his daughter to wife.
1 Samuel 18:25
Then said Saul, "This wise say to David: 'The king careth for no other dowry but for a hundred foreskins of the Philistines, to be avenged of the king's enemies." For Saul thought to make David fall into the hands of the Philistines.
2 Samuel 2:10
And Ishbosheth Saul's son was forty years old when he began to reign over Israel - and reigned two years. But the house of Judah only followed David.