They live in neglected provinces such as Asir, Jizan and Najran; but also in the big cities. Al-Suwaidi, al-Jarradiyah and al-Shimaisi (in Riyadh) and al-Karantina, al-Rowais and al-Salamah (in Jeddah) are slums that rival each other in notoriety, inhabited not just by extremely poor Saudis but also by foreign workers.