Kitāb al-Ghayba 1, narration 139

Translation

H 77 - In the same way, Hasan bin Ali Washa was also a Waqifite of his time; then he returned to belief in the twelve Imams and repented for his past mistakes; the cause of his repentance, as he himself states, was that: I traveled to Khorasan for business. When I reached there, Abul Hasan Ridha (a.s) sent someone and asked me for the striped cloth from Yemen. It was among the merchandise that I was having, but I had forgotten it, so I said: I don’t have any striped cloth. The Imam’s messenger went away, but returned again to inform me that I was having it in so and so bundle; I found it at the same place and sent it to the Imam. After that I wrote some questions, which I wanted to ask him. Just as I reached his place, the Imam emerged from inside and mentioned to me the replies of the questions, which I wanted to ask him and about which no one knew anything. On witnessing this miracle, Hasan bin Ali Washa gave up his Waqifite beliefs and adopted faith in the Imamate of Imam Ridha (a.s).

Translation: Sayyid Athar Husain S. H. Rizvi — published with the edition, reproduced verbatim.