50-3 Abdul Wahid ibn Muhammad ibn Abdoos al-Neishaboori al-Attar narrated in Neishaboor in the year 352 A.H. (962 A.D.) that Ali ibn Muhammad ibn Qutayba quoted on the authority of Al-Fadhl ibn Shathan, on the authority of Safwan ibn Yahya, on the authority of Muhammad ibn Ya’fur al-Balkhi, on the authority of Musa ibn Mehran, “I heard Isa ibn Ja’far tell Harun (Ar-Rashid) when he was going from Raqqah to Mecca, ‘Do not forget what you have sworn to about the household of Abi Talib.You have sworn to chop off the head of anyone who claims to be a Divine Leader after Musa ibn Ja’far. Now this is his son Ali (Ar-Ridha’ ) who is claiming to possess the Divine Leadership, and people are saying about him the same thing that they said about his father.’ Harun looked at him angrily and said, ‘So what? Do you think that I should kill them all?’ Musa ibn Mihran added, “Once I heard this I went and informed Ar-Ridha’ about this. Ar-Ridha’ said, ‘What do I have to do with them? By God, they do not have the power to do anything to me.’”