2 Samuel 3:6

6. Abner made himself strong for the house of Saul Rather, in the house of Saul. He used his high official position in Saul’s court for purposes of self-aggrandizement and power. He seems to have regarded Ishbosheth as an incompetent ruler, and actually reigned in his name. By thus strengthening himself in the kingdom he was, perhaps designedly, paving his own way to the throne.