"But Saul had given his daughter Michal, David's wife, to Palti the son of Layish, who was from Gallim." (1 Sam 25:44)
"Then David sent messengers to Ish-bosheth, Saul's son, saying: "Give me my wife Michal, to whom I became engaged for 100 foreskins of the Philistines." So Ish-bosheth sent to take her from her husband, Paltiel the son of Laish. But her husband kept walking with her, weeping as he followed her as far as Bahurim. Then Abner said to him: "Go, return!" At that he returned." (2 Sam 3:14-16)