[Aḥmad ibn al-ʿAbbās al-Shāmī:] I left Baghdad to make the pilgrimage. On the way I met a man who bore the stamp of piety. He asked me where I was from. 17.1

“From Baghdad,” I replied, “which has gotten so corrupt that God is likely to wipe it off the face of the earth along with everyone who lives there. I was afraid, so I ran.” “Go back,” he said, “and don’t be afraid. In the city are the graves of four allies of God who will protect Baghdad from harm.” “Who are they?” “The exemplar Aḥmad ibn Ḥanbal, Maʿrūf al-Karkhī, Bishr ibn al-Ḥārith, and Manṣūr ibn ʿAmmār.” So I went back and visited the graves.

[The author:] Both reports agree up to this point. Abū Yaʿqūb adds:

I asked him, “Where are you headed?” “To visit the graves,” he replied.

“Where are you from?” “Look behind you.” I looked but there was nothing to see. When I turned around, he was gone.