Ali ibn Husayn Zayn al-Abidin
the fourth Shiite Imam, after his father Husayn, his uncle Hasan, and his grandfather Ali, the Prophet’s son-in-law.
He survived the Battle of Karbala and was taken along with the enslaved women to the caliph in Damascus. Eventually, however, he was allowed to return to Medina where he led a secluded life with only a few intimate companions. Imam Sajjad's life and statements were entirely devoted to asceticism and religious teachings mostly in the form of invocations and supplications. His famous supplications are well known as Al-Sahifa al-Sajjadiyya