Complex sentence: In the 410s and 420s Asadi was serving as a poet at the court of the Daylamite Abū Naṣr Jastān, where in 447/1055-56 he copied the Ketāb al-abnīa al-adwīa of Abū Manṣūr Mowaffaq Heravī.
Split into simpler sentences: In the 410s and 420s, Asadi served as a poet at the court of the Daylamite Abū Naṣr Jastān. Here, in 447/1055-56, he copied the Ketāb al-abnīa al-adwīa of Abū Manṣūr Mowaffaq Heravī.