Post a quote from "The History of al-Ṭabarī, Vol. 30: The ‘Abbāsid Caliphate in Equilibrium: The Caliphates of Musa al-Hadi and Harun al-Rashid"
Author: क्लिफोर्ड एडमंड बोसवर्थ
The citation is the literal transfer from the source and does not exceed ten lines