Σούννα, or Sunnah, refers to the practices, teachings, and examples set by the Prophet Muhammad in Islam. It serves as a guide for Muslims on how to live their lives according to the principles of their faith. The Sunnah complements the Quran, which is the holy book of Islam, providing context and elaboration on its teachings. The Sunnah is divided into two main categories: Sunnah Qawliyyah, which includes the sayings of the Prophet, and Sunnah Filiyyah, which encompasses his actions. Together, these elements help shape Islamic law and ethics, influencing the daily lives of Muslims around the world.