Abu Ja'far Muhammad ibn 'Ali ibn Babawayh al-Qummi, commonly referred to as Ibn Babawayh or al-Shaykh al-Saduq 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.

Man lā Yaḥḍuruhu al-Faqīh is a Hadith collection by the famous Twelver Shia Hadith scholar Abu Jaʿfar Muḥammad ibn ʿAli ibn Babawayh al-Qummi, commonly known as Ibn Babawayh or Sheikh al-Saduq. This work is included among the Four Books of Twelver Shia Islam.