He later moved to Baghdad and Damascus, before finally settling in Mopsuestia;[3] at one of the frontier stations to the Byzantine Empire, where he mainly deals with the organization of Islamic foreign and martial law (siyar) according to the teachings of his master al-Awzā'ī.
In Mopsuestia, whose ribat was expanded at the beginning of the eighth-century and inhabited by Muslim troops,[5] he always had a large circle of pupils.
The scholars Ibn 'Asākir and Ibn Hajar al-'Asqalānī report in their biographies that he instructed the Ribatians, taught them the Sunnah and the Enjoining good and forbidding wrong[6] Although a legal theorist, he also served in the military and his participation in a summer campaign in 772 is attested.
[6] Ibn Sa'd mentions in his class book that he, like his teacher al-Awzā'ī, was among the scholars who stayed and worked in the Ribats.
From the remaining manuscript fragments, Ḥammāda lists the legible chapter headings in the appendix.