The Quran is the holy book of Islam, believed by Muslims to be the word of God (Allah) revealed to the Prophet Muhammad through the angel Gabriel. It is written in Arabic and consists of 114 chapters, called surahs, covering spiritual, legal, and moral guidance. The Quran emphasizes monotheism, justice, compassion, and accountability in the afterlife. It is recited and memorized by millions around the world and serves as the foundation of Islamic faith and practice.