Behzadan Pour Vandad Hormozd, known as Abū Muslim al-Khurasānī (718–755 AD), was an Iranian military commander and leader of the Black Cloaks movement in Khurasan, who succeeded in overthrowing the Umayyad Caliphate and establishing the Abbasid Caliphate. His original name was Behzadan Pour Vandidad or Vandad (son of Vandad), which was changed to Abdul Rahman at the suggestion of Ibrahim Imam, one of the prominent figures of the Abbasids. He was sent to Khurasan by his order to take charge of the anti-Umayyad movement in this region.

Some claim that he wished to establish a national Iranian government and that he fought against the Umayyads, dressed in religious rebellion, to seize the caliphate. Others consider his motivation to be purely religious and devoid of ethnic implications. It can be said that he simply wanted to destroy the Umayyads and that the social and political aspects of his revolution were more prominent than the religious ones.