Ali ibn Husayn (Arabic: علي بن الحسين‎) known as Zayn al-Abidin (the adornment of the worshippers) and Imam al-Sajjad (The Prostrating Imam), was the fourth Shia Imam, after his father Imam Husayn, his uncle Imam Hasan, and his grandfather Imam Ali. Ali ibn Husayn survived the Battle of Karbala and was taken to the caliph in Damascus. Eventually, he was allowed to return to Medina, where he led a secluded life with 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 known as Al-Sahifa al-Sajjadiyya.