Banu Kalb
The ancient oasis town was among a number of cities that the Pre Islamic Arabs would travel to as part of the sequence of market fairs held annually. In contrast to the other market cities, Duma was characterized by its disputed political sovereignty between Arab clients of the Byzantines and Sasanids that made claims to it. The markets of Duma specialized in slavery and prostitution with the Banu Kalb, the dominant tribal group in the area, being known to practice slavery more than other tribes.