2 Samuel 3:12-13

12Then Abner sent messengers to David [who was] in his place [at Hebron], saying, “Whose is the land? Make your covenant (treaty) with me, and behold, my hand shall be with you to bring all Israel over to you.”

13David said, “Good! I will make a covenant (treaty) with you, but I require one thing of you: you shall not see my face unless you first bring Michal, Saul’s daughter, when you come to see me.”