 However, according to another 9th-century scholar, Abu Ubayda, Abu Sufra was a Persian weaver who migrated from Kharak (Karachi) to Oman before settling in the Arab garrison town of Basra in Iraq.According to this account, he was accepted by the Azd as one of their own by dint of the courage he demonstrated in battle.The Azd had dominated Oman (Uman) since the pre-Islamic era and hence were known as the "Azd Uman" to distinguish them from the "Azd Sarat", who were based in western Arabia.