2 Samuel 3:12-13

12Then Abner sent messengers on his behalf to David, saying, “Whose is the land?” saying also, “Make your covenant with me, and indeed my hand shall be with you to bring all Israel to you.”

13And 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.”