Zabbaleen
The Zabbaleen ( ', ) is a word which literally means "garbage people" in Egyptian Arabic. The contemporary use of the word in Egyptian Arabic is to mean "garbage collectors". In cultural contexts, the word refers to teenagers and adults who have served as Cairo's informal garbage collectors since approximately the 1940s. The Zabbaleen (singular: ', ) are also known as Zarraba (singular: Zarrab), which means "pig-pen operators." The word ' came from the Egyptian Arabic word ' (, ) which means "garbage".
Sabians
The Muslim scholar Al-Khalil ibn Ahmad al-Farahidi (d. 786–787 CE), who was in Basra before his death, wrote: "The Sabians believe they belong to the prophet Noah, they read Zabur, and their religion looks like Christianity." He also states that "they worship the angels". According to the Qur'an, the "Zabur", the second book of Abrahamic tradition, was given to King David of ancient Israel. Many modern scholars identify the "Zabur" as the Psalms.