The Book of Occultation — al-Ṭūsī · Hadith 644 (#Ḥadīth #23)
Chapter 47 | False claimants of deputyship of Imam who are also clearly condemned by the Imams
ذكر أمر أبي بكر البغدادي ابن أخي الشيخ أبي جعفر محمد بن عثمان العمري وأبي دلف المجنون:
The matter of Abu Bakr Baghdadi nephew of Abu Ja’far Muhammad Ibn Uthman Amari and the incident of Abi Dalf Majnun:
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).