Bihar al-Anwar (Arabic: بِحَار ٱلْأَنْوَار, romanized: Biḥār al-Anwār, lit. Seas of Lights) is a comprehensive collection of traditions (ahadith) compiled by Shia scholar Mohammad-Baqer Majlesi (d. 1110/1698), known as Allama Majlisi. It is a hadith collection as the secondary source used beside the Four Books. Source: Wikipedia (en)