Musannaf Ibn Abi Shaybah 31877 — Distinguishing marks

Hammad bin Salamah says that Thabit said: We were in a place which riding animals could not pass through. I stood up, reciting these verses: "Forgiver of sin, Accepter of repentance, severe in punishment" [Ghafir: 3]. He said: Then an elderly man passed by on a grey mule and said: "Say: 'O Forgiver of sin, forgive my sin. O Accepter of repentance, accept my repentance. O Severe in punishment, pardon me from my punishment. O Possessor of bounty, bestow good upon me.'" He said: I recited these words. Then I looked, and I could not see him there.