Besides...
Besides, consider the people of Iraq, and if they desire that you depose a Governor every day, do not refuse, for it is easy to change a Governor than to face ten thousand swords drawn forth facing you. Favor the people of Syria for they are your near-ones and your reservoirs, and if you fear an enemy, ask for their help. And when you have accomplished your goal (of defeating the enemy) return them back to the cities (of Syria), for if they remain elsewhere their manners will change.
I do not fear anyone opposing or fighting with you on the question of Caliphate except four persons. Those being Husayn bin Ali, Abdullah bin Umar, Abdullah bin Zubayr and Abdul Rahman bin Abu Bakr. [^1] As regards Abdullah bin Umar, (excessive) worship has broken him, if no one remains to assist him, he shall succumb to you. As regards Husayn bin Ali, he is light-minded person, and the people of Iraq will betray him until they force him to rebel.
If he revolts and you gain victory over him, excuse him, for he is linked to us through relation and he keeps greater right while having relation and nearness of the Holy Prophet. As regards the son of Abu Bakr, he follows that what his companions like, and his aspiration are only women and play. While the one who like a Lion lies in ambush, and the Fox who is playing a game with you and is in track of an opportunity to pounce upon you is the son of Zubayr.
And if he revolts and you gain victory over him, separate every joint of his. Try and keep safe the blood of our own people.” It is said that during the days of the illness and death of his father Mu’awiyah, Yazid was not present in Syria. Hence Mu’awiyah called for Zahhak bin Qays and Muslim bin Uqba Murri and instructed them to hand over his will to Yazid, while this seems quite acceptable.
Ibn Aseer further says that in his illness Mu’awiyah had become delirious and would sometimes say, “What is the distance between ourselves and Gootah (the name of a fertile oasis on the south side of Syria)” Hearing this his daughter started wailing aloud, “O Sorrow!” Mu’awiyah regained consciousness and said, “If you are incongruous (you have the right to do so), for you have seen the incongruous one.” When Mu’awiyah died, Zahhak bin Qays came outside his house and ascended the pulpit when the shroud of Mu’awiyah was in his hands.