2 Samuel 2:8, 12

Now [Saul’s cousin] Abner the son of Ner, commander of Saul’s army, had taken Ish-bosheth the son of Saul and brought him over to Mahanaim.

Now Abner the son of Ner and the servants of Ish-bosheth the son of Saul went out from Mahanaim to Gibeon.