Ahmad ibn Ali al-Najashi

Abū al-ʿAbbās Aḥmad ibn ʿAlī al-Najāshī (c. 982–1058), often simply referred to as al-Najāshī, was a Twelver Shi'ite scholar mainly known for his work on the subject of biographical evaluation (ʿilm al-rijāl, Islamic science dealing with the reliability of hadith transmitters), called the Rijāl al-Najāshī.