8-4 Muhammad ibn Ibrahim ibn Ishaq al-Taleqani - may God be pleased with him - narrated that Al-Hassan ibn Ali ibn Zakariya from Medina who quoted on the authority of Abu Abdullah Muhammad ibn Khalilan, on the authority of his father, on the authority of his grandfather, on the authority of Attab ibn Osayd who narrated that he had heard from a group of the Sheikhs from Medina, “Fifteen years of the rule of Harun Ar-Rashid had passed when God’s friend - Musa ibn Ja’far (s) was martyred. He was poisoned by As-Sindi ibn Shahak upon the orders of Ar-Rashid while imprisoned in the well-known jail called “Dar al-Mosayyab” in Bab al-Kufa in which As-Sidreh is located. The Imam (s) went to the Paradise of the Sublime God and to His Nobleness on Friday of the fifth day of the (Arabic) month of Rajab in the year 183 A.H. (798 A.D.). He was fifty-four years old then. And his tomb is in the western part of Madinatus Salam in a shrine known as the cemetery of the Quraysh .