Analysis of information sources in references of the Wikipedia article "Tayyibiten" in German language version.
„Lit. ‘summons’, ‘mission’ or invitation to Islam. Amongst Shi‘i Muslims, it was the invitation to adopt the cause of the Imamat. It also refers more specifically to the hierarchy of the Ismaili religious organisation in the pre–Fatimid, Fatimid, and Alamut periods of Ismaili history.“