Sii wad qoraalka faqradan - Dagaalkii sokeeye ee u dhexeeyay
Califaadka la tartamayay al-Amin (r. 809<unk>813) iyo al-Ma'mun (r. 813 <unk> 833), Yaziid waxaa loo magacaabay guddoomiyaha Yemen by al-Ma'mun's general Tahir ibn al-Husayn, oo leh amar ah in gobolka la hoos geeyo al-Ma'mun. Sidaa awgeed wuxuu u ambabaxay Yemen isagoo wata ciidan badan oo fardooley ah, markii uu yimid wuxuu ku qanciyay Yemen inay ka tanaasulaan al-Amin oo ay u dhaarteen al-Ma'mun. Si kastaba ha noqotee, si dhakhso leh ayuu dhibaatooyin ugu yimid siyaasaddiisa taageeridda Qahtanite Carabta ee gobolka iyada oo kharashka ku baxaya "abna" ee maxalliga ah, oo uu ula dhaqmay si aad u daran. Wax yar ka dib geeridii al-Amin ee 813, warkii ku saabsan dhibaataynta Yazid ee "abna" ayaa gaadhay al-Ma'mun, oo ka jawaabay isaga oo ka qaaday guddoomiyaha. Ka dib xilka qaadistiisa, waxaa lagu xiray Sana'a kii beddelay Cumar ibnu Ibraahim ibnu Waqid al-Umari waxaana lagu tuuray xabsi.