So the successors did that after him.

So the successors did that after him." He (i.e., Abu al-Faraj al-Isfahani) said: "Al-Hasan, peace be on him, wrote to Mu'awiya and Harb b. 'Abd Allah al-Azdi: From al Hasan b. 'Ali, the Commander of the faithful, to Mu'awiya b. Abu Sufyan. Salamun 'alayka ( peace be on you). Indeed, I thank Allah, Who there is no god but He, instead of you. Now then, verily, Allah, the Great and Almighty, appointed Muhammad as mercy for worlds, and as favor for the believers and all people.

(He appointed him) to warn those who are still living, and to enforce the words on the unbelievers. So he (Muhammad) propagated the messages of his Lord. He carried out the order of Allah. He did not fall behind or neglect anything. Then Allah caused him to die after He had shown the truth and destroyed polytheism through him. He (Allah) singled out Quraysh through him (Muhammad).

So He (Allah) said to him: 'And it (the Qur'an) is a reminder for you and for your people.' When he (Muhammad) died, the Arabs differed over his authority. So Quraysh said: 'We are his tribe, his family, and his friends. You have no right to dispute with us over the authority of Muhammad and his right.' Thus the Arabs believed the words of Quraysh and their proof for that (succession) against him who disputed with them over the authority of Muhammad. So you bestowed upon them and yielded to them.

Then we argued with Quraysh as the Arabs did. However, Quraysh did not treat us with justice as the Arabs treated them. They (Quraysh), with exclusion of the Arabs, took this matter through (asking) equity and protest. When we, the members of the House of Muhammad and his friends, began disputing with them (Quraysh) and asked them to treat us with justice, they turned away from us, seized (power), and gathered together to oppress and force us. So we suffered from their persecutions towards us.

"We became astonished at those who took unjustly our right and the authority of our family. If they (Quraysh) had an outstanding merit and priority in Islam, we would refrain from disputing with them for fear that the hypocrites and the allies (ahzab) might find a gap to corrupt the religion. "So today, Mu'awiya, the person is astonished at you. For you have usurped the authority. However, you are not appropriate for it. You have no known merit in the religion. You have no laudable act in Islam.

Your are the son of an ally (hizb) of the allies (ahzab).