Finally the caliph al-s thought he would solve the problem...

Finally the caliph al-s thought he would solve the problem by naming the Imam as his own successor, hoping thus to ensnare him in worldly affairs and turn the devotion of his followers ways from him. After finally being able to persuade Ar-Ridha’ (as) to accept, al-Ma'mun realized his mistake, for Shi'ism began to spread even more rapidly. Finally he is said to have had the Imam poisoned. Ar-Ridha’ (as) is buried in Mashhad in Iran. [^5]: Oyoon Akhbar Ar-Ridha’, p.