Interaction between Imam Ridha (as) and the Fathiyyah

The group of Fathiyyah who believed in the leadership of the eldest son of Imam Sadiq, named Abdullah Aftah, was among the Shiite groups of the age of Imam Ridha. This group itself was divided into some sub divisions; some of their famous jurists, without omitting the leadership of Abdullah Aftah from the train of their Imams, accepted the leadership of Imam Kazim as well. In this order, they regarded Imam Ridha as their ninth Imam. So, the most fundamental belief of them was the convey of Imamah from one brother to the other. Studying the interaction between Imam Ridha and the group of Fathiyyah is the subject of this research and it is trying to deal with this subject in a descriptive-analytic way. The result of this research is as follow: converting some of members of this group from their belief into Imamiyyah by Imam Ridha`s teachings and activities; In this way of antithesis, Imam Ridha was mainly thinking about the guidance of them and he was almost succesful.