2 Samuel 3:6

And it came to pass while there was war between the house of Saul and the house of David, that Abenner was governing the house of Saul.

And it came to pass, while there was war between the house of Saul and the house of David, that Abner made himself strong for the house of Saul.

While there was war between Saul’s house and David’s house, Abner made himself strong in Saul’s house.