Sayyiduna Shaddad bin Aws (may Allah be pleased with him) narrates: The Prophet Muhammad (peace and blessings be upon him) said: "I only fear for my Ummah from misguided rulers. When the sword is placed among my Ummah (that is, when fighting begins among them), it will not be lifted from them until the Day of Resurrection (that is, their mutual fighting will not end)."
Hadith Referenceصحیح ابن حبان / كتاب السير / 4570
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - «المشكاة» (5394)، «الصحيحة» (1582).فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح