Imam Zain al-Abidin, also known as Ali ibn Husayn, was the fourth Imam in Shia Islam and the son of Imam Husayn, the grandson of Imam Ali. He was born in 658 CE and is known for his piety, knowledge, and leadership during a tumultuous period following the Battle of Karbala, where his father was martyred. Imam Zain al-Abidin is particularly recognized for his work, Sahifa Sajjadiyya, a collection of supplications and prayers that emphasize spirituality and ethical conduct. He played a crucial role in preserving the teachings of Islam and advocating for justice and compassion in society.