Bihar al-Anwar is a comprehensive collection of hadiths (sayings and actions of the Prophet Muhammad and his family) compiled by the Shiite scholar Allama Muhammad Baqir Majlisi in the 17th century. The title translates to "Seas of Light," reflecting its extensive coverage of Islamic teachings, history, and theology. The work spans 110 volumes and addresses various topics, including the lives of the Imams, Islamic ethics, and eschatology. It serves as a crucial reference for Shiite Muslims, providing insights into their beliefs and practices while preserving the teachings of Ahl al-Bayt, the family of the Prophet.