عبد الرحمن بن مهدي
Abd al-Rahman ibn Mahdi
Abu Said
135 AH / 752 CE198 AH / 813 CEtabe_tabiunthiqah
Basra
Ibn Mahdi was a leading hadith critic and teacher of Imam Ahmad and others. He played a pivotal role in transmitter evaluation standards. Scholars grade him as trustworthy and authoritative.