Common mistakes in Persian Writing

650 CE. After the Abbasids came to power (750 CE), the Iranians became the scribes and bureaucrats of the Islamic Caliphate and, increasingly, also its writers and poets. The New Persian language literature arose and flourished in Khorasan and Transoxiana because of political reasons, early Iranian dynasties of post-Islamic Iran such as the Tahirids and Samanids being based in Khorasan