2 Samuel 3:20-23

20When Abner came with twenty men to David at Hebron, David made a feast for Abner and the men who were with him. 21And Abner said to David, “I will arise and go and will gather all Israel to my lord the king, that they may make a covenant with you, and that you may reign over all that your heart desires.” So David sent Abner away, and he went in peace. 22Just then the servants of David arrived with Joab from a raid, bringing much spoil with them. But Abner was not with David at Hebron, for he had sent him away, and he had gone in peace. 23When Joab and all the army that was with him came, it was told Joab, “Abner the son of Ner came to the king, and he has let him go, and he has gone in peace.”