"The Saffarids gave great care to the Persian culture. Under their rule, the eastern Islamic world witnessed the emergence of prominent Persian poets such as
Fayrouz Mashriqi,
Abu Salik al-Jirjani, and
Muhammad bin Wasif al-Sistani, who was a court poet.
[20]
In the later 9th century, the Saffarids gave impetus to a renaissance of New Persian literature and culture. Following Ya'qub's conquest of Herat, some poets chose to celebrate his victory in Arabic, whereupon Ya'qub requested his secretary, Muhammad bin Wasif al-Sistani, to compose those verses in Persian.
[21]"