Zain al-Abidin, also known as Ali ibn Husayn, was the fourth Imam in Shia Islam and a significant figure in Islamic history. He was born in 658 CE and was the son of Husayn ibn Ali, the grandson of Ali ibn Abi Talib, and the great-grandson of the Prophet Muhammad. Zain al-Abidin is best known for his piety, scholarship, and the collection of supplications known as Sahifa Sajjadiyya. After the tragic events of the Battle of Karbala in 680 CE, where his father was martyred, Zain al-Abidin became a symbol of resilience and spiritual leadership. He spent much of his life in Medina, focusing on prayer, teaching, and preserving the teachings of Islam. His contributions to Islamic thought and ethics continue to be influential among Muslims today.