2 Samuel 3:12-13

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

13“Good!” said David. “I will cut a covenant with you. But one thing I require of you: you will not see my face unless you first bring Saul’s daughter Michal when you come to see my face.”