Nyorai mberi kweiyi ndima - Muvambi wedzinza reTahirid aiva Tahir ibn Husayn, mukuru mukuru akanga atamba basa guru muhondo yevagari vemo
pakati pavakwikwidzi caliphs al-Amin naal-Ma'mun. Iye nemadzitateguru ake vakanga vambopiwa hurumende duku kumabvazuva kweKhorasan nokuda kwebasa ravo kuAbbasids. Muna 821, Tahir akaitwa gavhuna weKhorasan, asi akafa nguva pfupi yapfuura. Khalifa akabva agadza mwanakomana waTahir, Talha, uyo aiva gavhuna kubva muna 822 kusvika muna 828. Mumwe mwanakomana waTahir, Abdullah, akagadzwa semutongi weEjipitori neArabia Peninsula, uye pakafa Talha muna 828 akapiwa hurumende yeKhorasan. Abdullah anoonekwa semumwe wevatongi vakuru veTahirid, sezvo kutonga kwake kwakaona kukura kwekurima munyika yake yekuzvarwa yeKhorasan, kufarirwa munyika dzekumabvazuva kweAbbasid caliphate uye kuwedzera simba nekuda kwechiitiko chake nemativi ekumadokero e caliphate.