Aḥmad ibn Muḥammad ibn ʿUbayda

Zakariyyā ibn Yaḥyā ibn al-Ḥārith al-Naysābūrī related to us. He said: Aḥmad ibn Muḥammad ibn ʿUbayda related to me. He said: Abū Ibrāhīm Ismāʿīl ibn Yaḥyā al-Muzanī related to us. He said: ʿAlī ibn Maʿbad related to us, from ʿUbayd Allāh ibn ʿUmar, from al-Aʿmash: He said: ‘Nuʿmān! What do you say about such-and-such?’ He said: ‘Such-and-such.’ He said: ‘On what basis?’ He said: ‘You related to us from so-and-so, from so-and-so.’ Al-Aʿmash said: ‘Jurists! You are the physicians, and we are the pharmacists.’