A "Surah" is a chapter of the Quran, the holy book of Islam. The Quran consists of 114 Surahs, each varying in length and covering different themes, including guidance, morality, and law. Surahs are recited in prayers and are fundamental to the practice of Muslim faith. Each Surah is composed of verses called Ayahs. The Surahs are traditionally arranged from longest to shortest, with the exception of the first Surah, Al-Fatiha, which is a prayer for guidance. Surahs can be revealed in different contexts, including during the life of the Prophet Muhammad.