The classic study of tribal law in the Barat region of Dhū Muḥammad by Paul Dresch is available online. This is written in English

An old photograph of the old city of Sanaa. I suspect it is from the late Ottoman era.

Muḥammad b. Aḥmad Abū al-‘Uqūl was a court astronomer for al-Malik al-Mu'ayyad Dāwūd and flourished around 1300 CE. His masterful set of...