The Book of Occultation — al-Ṭūsī · Hadith 308 (#Ḥadīth #16)

128- وروى سعد بن عبد الله عن أبي محمد الحسن بن عيسى العلوي قال: حدثني أبي عيسى بن محمد عن أبيه محمد بن علي بن جعفر عن أبيه علي بن جعفر عن أخيه موسى بن جعفر عليه السلام قال: قال لي: يا بني، إذا فقد الخامس من ولد السابع من الأئمة فالله الله في أديانكم،فإنه لا بد لصاحب هذا الأمر من غيبة يغيبها حتى يرجع عن هذا الأمر من كان يقول به. يا بني،إنما هي محنة من الله امتحن بها خلقه لو علم آباؤكم وأجدادكم دينا أصح من هذا الدين لاتبعوه. قال أبو الحسن: فقلت له: يا سيدي، من الخامس من ولد السابع؟ قال: يا بني، عقولكم تصغر عن هذا وأحلامكم تضيق عن حمله، ولكن إن تعيشوا تدركوه.

H 128 - It is narrated from Saad bin Abdullah from Abu Muhammad Husain bin Isa Alawi from his father, Isa bin Muhammad from his father, Muhammad bin Ali bin Ja’far from his father, Ali bin Ja’far from his brother, Musa bin Ja’far that he said: My father [Imam Ja’far Sadiq ] said: “My son, when the fifth descendant of the seventh Imam disappears, then by Allah, by Allah, be cautious about your faith, because definitely there such is a occultation for this Patron until many who believe in this matter turn away from their beliefs. My son, his occultation would be a trial from Allah, by which He will try His creation. If your fathers and grandfathers knew a creed better than this, they would have followed it.” Ali bin Ja’far said: Abul Hasan [Imam Musa Kadhim ] asked: “My master, who is the fifth descendant of the seventh?” He said: “My son, your intellects are deficient to understand him and you cannot bear it, but if you live, you will see that matter.”

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