The sixth Imam, Abu \’Abd Allah Ja\’far, the eldest son of Muhammad al-Baqir, was born in Medina either in 80/690 700 or 83/703-704.[641] On his father\’s side Ja\’far was of course a Husaynid descendant of the Prophet, and like his father he had a doubly strong relationship to \’Ali, since Muhammad al-Baqir was an \’Alid on both his father\’s and his mother\’s sides.[642]