The Holy Imam Ali(zayul abidin) is the fourth imam and was popularly know as Zaynul abidin. The mother of this holy Imam was the royal personage shahr Banu the daughter of King yazdgerd the perislamic ruler of Persia.Imam Zyanul abidin spent his first two year of infancy in th lap of Ali ibn Abi Talib and twelve years he had the gracious patronage of his uncle the imam al-Hassan.
The knowledge and piety of this holy imam was matchless AZ-Zuhari. al-Waqidi and Ibn Uyaynah say that they could not find any one equal to him in peity and Godliness.He was so mindful of allah that when ever he sat for prayer his face complexion changed and all of his body tremble.When he was asked why it is so he answered " Know ye not before whom i stand in prayer and with whom i hold discourse"
His charity was unassuming and hidden.After his passing away the people said that hidden charity ended with the departure of Imam,like his grand father Holy Imam take the bag of flour on his back to the doors of poor families.
This Imam was also present in Karbala .at the time of gruesome tragedy of the massacre of his father and all of his cousins , brothers and friends of his father and suffered a heartless captivily and imperisonment at the hands of devilish forces of Yazid.
The Holy Imam lived about thirty four years after the tragedy of karbala and spent all his life in prayer and in remembrance of his father and family.he never forget his prayers even at he time when all of men of his family have been killed by the Yazid's army and all the tent were set to fire and all rest were taken to captivty he offer all his prayer and tahajud , THIS IMAM IS ALSO POPOLARLY KNOW AS "SAJJAD"
On the 25th of Muharam 95 A.H when he was in Medina , the Governer of Medina give him poison, The funeral prayers for this Holy Imam were conducted by Fifth Imam Baqir his Son and he was buried in Jannat-ul-baqi Grave yard .