Muslims (Arabic: مُسلِم‎) are people who follow or practice Islam, a monotheistic Abrahamic religion. Muslims consider the Quran, their holy book, to be the verbatim word of God as revealed to the Islamic prophet and messenger Muhammad, may peace be upon him and his family. Muslims also generally follow the teachings and practices of Muhammad (sunnah). Those who obtain these teachings primarily from his Companions (sahaba) are called Sunni, and those who take them from his family (ahl al-bayt) are called the Shi'a.