It is narrated by Bandagi Miyan Shah Nemat Rzi. that he requested Imam Mahdi Ahs to "permit him to read (and learn)."
Imam Mahdi Ahs disallowed reading and said "You would not have accepted the Mahdiat of this servant (of Allah), if you were learned."
(Hashia Insaaf Nama - Matan Sharif, N.1)