The Quran is the holy book of Islam, believed by Muslims to be the word of God (Allah) revealed to the Prophet Muhammad (peace be upon him) over 23 years. It is written in classical Arabic and contains 114 chapters (Surahs). The Quran provides guidance on faith, morality, worship, social justice, and human behavior. It emphasizes the oneness of God, the importance of compassion and charity, and encourages reflection on the signs of God in nature and life. Muslims recite, memorize, and study it daily as a spiritual and moral guide.