The Four Books
Abu Ja'far Muhammad ibn 'Ali ibn Babawayh al-Qummi (Persian: ; –991), commonly referred to as Ibn Babawayh (Persian: ) or al-Shaykh al-Saduq (Persian: ) was a Persian Shia Islamic scholar whose work, entitled "Man La Yahduruhu al-Faqih" (), forms part of The Four Books of the Shia Hadith collection.