2 Samuel 3:24-25

3:24 So Joab went to the king and said, “What have you done? Abner has come to you! Why would you send him away? Now he’s gone on his way! 3:25 You know Abner the son of Ner! Surely he came here to spy on you and to determine when you leave and when you return and to discover everything that you are doing!”