The Book of Occultation — al-Ṭūsī · Hadith 141 (#Ḥadīth #5)

79- وروى عبد الله بن جعفر الحميري عن محمد بن عيسى اليقطيني قال: لما اختلف الناس في أمر أبي الحسن الرضا عليه السلام جمعت من مسائله مما سئل عنه وأجاب عنه خمس عشرة ألف مسألة.

H 79 - Abdullah bin Ja’far Himyari has narrated from Muhammad bin Isa Yaqtini that he said: When people fell into discord with regard to the Imamate of Abul Hasan Imam Ridha , I collected the questions that were framed to gain confidence and certainty in his Imamate; and they totalled up to 15000, all of which the Imam replied.

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).