 Even before Muhammad ibn Wasif Sagrzi (the first known poet of Iran) who composed in the Qasida form in Sistan, Tabari has mentioned that the elders of Maragha read the Persian Fahlavi vernacular) poetry of Mohammad ibn Ba'ith ibn Halbas, the ruler of Marand.Halbas, which was his grandfather, was himself a recent Arabian migrant from the lands of Najd and Hijaz, and the Persian poetry of his grandson was due to his accurlation in the local culture.Pg 20 on USSR writers again