2 Samuel 3:12-13, 21

And Abner sent messengers to David on his behalf, saying, Whose is the land? saying also, Make thy league with me, and, behold, my hand shall be with thee, to bring about all Israel unto thee. And he said, Well; I will make a league with thee: but one thing I require of thee, that is, Thou shalt not see my face, except thou first bring Michal Saul's daughter, when thou comest to see my face.

And Abner said unto David, I will arise and go, and will gather all Israel unto my lord the king, that they may make a league with thee, and that thou mayest reign over all that thine heart desireth. And David sent Abner away; and he went in peace.