2 Samuel 3:12-13, 21

Then Abner sent messengers to David, saying, “Doesn’t the entire land belong to you? Make a solemn pact with me, and I will help turn over all of Israel to you.” “All right,” David replied, “but I will not negotiate with you unless you bring back my wife Michal, Saul’s daughter, when you come.”

Then Abner said to David, “Let me go and call an assembly of all Israel to support my lord the king. They will make a covenant with you to make you their king, and you will rule over everything your heart desires.” So David sent Abner safely on his way.