Umayyad rule's inevitable collapse
Nahj al-Balāgha|Volume 1|Book 3|Chapter 464
٤٦٤. وَقَالَ (عليه السلام): إِنَّ لِبَنِي أُمَيَّةَ مِرْوَدَاً يَجْرُونَ فِيهِ، وَلَوْ قَدِ اخْتَلَفُوا فِيَما بَيْنَهُمْ ثُمَّ كَادَتْهُمُ الضِّبَاعُ لَغَلَبَتْهُمْ.
464. Amīr al-mu’minīn, peace be upon him, said: The Banū Umayyah (Umayyids) have a fixed period (mirwad) wherein they are having their way. But when differences arise among them then even if the hyena attacks them it will overpower them.