Ammár b. Yazid is one of the leaders of the early Hashimiyya movement in Khurásán. Having played apart unacceptable to theAbbasids in the formative sta.g.e.s their da’wa in Khurásán, the official Abbasid propaganda later obliterated as much as possible of his memory, minimised his part in the da’wa and presented him as a heretic. Around 111/ 729 a dái (propaganist) named Ammár b. Yazid and nicknamed Khidásh was send Merw to head a new Abbasid da’wa organization in Khurasan. Khidash expounded extremist doctrines and was eventually repudiated by the Abbasid imam, Muhammed b. Ali; He was arrested and executed in 118/736. Khidash had acquired followers of his own, known as the Khidashiyya. Some Heresiograhhers report that Khidash taught the doctrines of the Khurramiyya