People of the Book, or Ahl al-Kitāb, is a classification in Islam for the adherents of those religions that are regarded by Muslims as having received a divine revelation from Allah, generally in the form of a holy scripture. The classification chiefly refers to pre-Islamic Abrahamic religions. In the Quran, they are identified as the Jews, the Christians, the Sabians, and—according to some interpretations—the Zoroastrians. Beginning in the 8th century, this recognition was extended to other groups, such as the Samaritans, and, controversially, Hindus, Buddhists, Jains, and Sikhs, among others. In most applications, "People of the Book" is simply used by Muslims to refer to the followers of Judaism and Christianity, with which Islam shares many values, guidelines, and principles.
