 His brother, Muhammad, was charged with suppressing the Qaysi tribes, while Abd al-Aziz maintained peace and stability as governor of Egypt until his death in 705.During the early years of his reign, Abd al-Malik heavily relied on the Yamani nobles of Syria, including Ibn Bahdal al-Kalbi and Rawh ibn Zinba al-Judhami, who played key roles in his administration; the latter served as the equivalent to the chief minister or "wazīr" of the later Abbasid caliphs.Furthermore, a Yamani always headed Abd al-Malik's "shurṭa" (elite security retinue).