2 Samuel 3:12-13
12 Abner sent messengers as his representatives to say to David, “Whose land is it? Make your covenant with me, and you can be certain I am on your side to hand all Israel over to you.”
13 David replied, “Good, I will make a covenant with you. However, there’s one thing I require of you: Do not appear before me unless you bring Saul’s daughter Michal(A) here when you come to see me.”