Jafar ibn Muhammad (Arabic: جعفر بن محمد) (702-765), also known as As-Sadiq ("The Truthful") was the sixth Shia imam. He was the grandson of Zayn al-Abidin and the descendent of Ali ibn Abi Talib on the side of his father and Abu Bakr on the side of his mother. He is highly respected among both the Sunnis and the Shias. He was a spiritual person, hadith teller and a jurist. 