originally a zoroastrian, he later converted to islam and became the "mawla" of talha ibn abd allah al-khuza'i, an arab nobleman from the khuza'i tribe, who served as the governor of sistan. ruzaiq's son mus'ab later played a prominent role in the abbasid revolution, and was later rewarded by the abbasid caliphs by being appointed as the governor of pushang and herat. ruzaiq probably died some years later.