It was the claimed cleverness that urged Mu'awiya to follow...
It was the claimed cleverness that urged Mu'awiya to follow such a kind of killing, which his son Yazid was unable to accomplish. Thus this (i.e., Yazid) was "a self-conceited young man and that (i.e., Mu'awiya) was experienced in managing the affairs! If Abu Sufyan had lived for a longer time, he would have been sure that these two sons of his (i.e., his son Mu'awiya and his grandson Yazid) were able to achieve the game, which he hoped for the children of his father.
Accordingly, Mu'awiya ordered Marwan b. al-Hakam[^1] to convince Ju'da bint al-Ash'ath b. Qays al-Kindi, who was one of the wives of al-Hasan, peace be on him, to give poison, which was a drink of honey mixed with Rome water, to drink. If al-Hasan died, Mu'awiya would marry her to his son Yazid, and would send her a hundred thousand dirhams. As Ju'da was the daughter of al-Ash'ath b.
Qays, the known hypocrite who became Muslim twice and there was atrocious apostasy between them, she was the nearest of all people to accept this abominable bargaining. Imam Ja'far b. Muhammad al-Sadiq, peace be on him said: "Indeed al-Ash'ath took part in killing the Commander of the faithful (i.e., Imam 'Ali), peace be on him. His daughter Ju'da poisoned al-Hasan.
Moreover, his son Muhammad took part in killing al-Husayn." I (i.e., the author) say: In this manner Mu'awiya accomplished what he wanted. Through this plot Mu'awiya was able to control the affairs of all the community. Thus he subjected the community to many disasters. Moreover, he filled himself and his children with spites so that they were liable to many battles and coups. Through this plot Mu'awiya was able to abolish all items of the Peace Treaty.
When al-Hasan, peace be on him, was about to die, he said:" Mu'awiya's drink (of poison) has acted upon (me). He has obtained his wish. By Allah, he has not fulfilled what he promised, nor has he been truthful in what he said."[^2] Marwan's letter concerning carrying out the evil plan came to Mu'awiya. So the latter said: "How wonderful! Al-Hasan took a drink of honey (mixed with) Rome water, so he died."[^3] Then Mu'awiya was unable to restrain his happiness when al Hasan, peace be on him, died.
"Mu'awiya was at al-Khadra'. Thus he exclaimed: `Allah is Great!' The people of al-Khadra' exclaimed: `Allah is Great!' with him. Then the people of the mosque exclaimed: `Allah is Great' when the people of al-Khadra' did that. So Fakhta (Mu'awiya's wife) bint (daughter of) Qarza b. `Amr b. Nawfa b.