The Musha'shaites established a Shi'i rule based upon Sayyid Muhammad ibn Falah's teachings in Huwayzah in the 9th century A.H. (845). Sayyid Muttalib Musha'sha'i, the 4th descendent of Sayyid Muhammad, ignoring temptation of power, was an emir and a scholar and patron of learning of the same time. By summoning scholars and establishing a religious school in Huwayzah, he trained a new generation of Musha'sha'i emirs. His son, Sayyid Khalaf, and his great grandson, Sayyid Ali Khan, are two of the learned men of that period who are considered as Shi'i scholars, authoring and leaving valuable works for the future generations.
)