So David sent messengers to Ishbosheth, Saul's son, saying, "Give me my wife Michal, whom I betrothed to myself for a hundred foreskins of the Philistines."
2 Samuel 3:14
Surrounding context
3:13 And David said, "Good, I will make a covenant with you. But one thing I require of you: you shall not see my face unless you first bring Michal, Saul's daughter, when you come to see my face."
3:14 So David sent messengers to Ishbosheth, Saul's son, saying, "Give me my wife Michal, whom I betrothed to myself for a hundred foreskins of the Philistines."
3:15 And Ishbosheth sent and took her from her husband, from Paltiel the son of Laish.