 Complete the following phrase:  Ibn Aʿtham names as his sources al-Madāʾinī, al-Wāḳidī, al-Zuhrī, Abū Mikhnaf and Ibn al-Kalbī, with al-Madaʾinī being the most cited. His narrative is fullest for the period from the reign of ʿUthmān down to that of Hārūn, particularly for events in Iraq. He is a major source for the conquest of Khorasan, the 