The mystical levels of this group are described in
The mystical levels of this group are described in the Epistles of the Brethren of Purity and Loyal Friends. They believe in the return of Muhammad at-Tamm from occultation, and subgroups include the Bhoras and Mustalis in Bombay and the Nizaris, led by the Aga Khan. The Assassins were also members of this sect, which was taken up by Ubayd Allah to found the Fatimids. Also known as the Stoppers because they believed the line of imams stopped at their namesake, this group was formed in 765 CE during a dispute over the successor to Jafar al-Sadiq. FTP, name this Shia group known either by the name or the ordinal position of that imam, the major Shiite division which is smaller than the Twelvers.
The mystical levels of this group are described in the Epistles of the Brethren of Purity and Loyal Friends.
Ismailis [or Seveners; or Sab'iyah; accept Waqifiyah; accept Stoppers before it is read]