The Quran is the holy book of Islam, believed by Muslims to be the word of God as revealed to the Prophet Muhammad through the angel Gabriel. It serves as a guide for personal conduct, law, and spirituality, and is written in Arabic. Comprising 114 chapters, known as Surahs, the Quran covers various aspects of life, morality, and guidance for humanity. It is recited and memorized by millions around the world, playing a central role in Islamic worship and culture.