The Book of Occultation — al-Ṭūsī · Hadith 203 (#Ḥadīth #8)
Chapter 22 | Reason of occultation of the Imam from his followers
فإن قيل: أي تقصير وقع من الولي الذي لم يظهر له الإمام لأجل هذا المعلوم من حاله وأي قدرة له على النظر فيما يظهر له الإمام معه وإلى أي شيء يرجع في تلافي ما يوجب غيبته؟
If it is said: What is the fault of the devotee to whom the Imam has not appeared? Because such prediction can be made about him, and how can he reflect on the miracle that will come with the Imam and what can he do to compensate for the cause of occultation?
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).