The Book of Occultation — al-Ṭūsī · Hadith 104 (#Ḥadīth #21)
Chapter 11 | Evidence of the Imamate of Imam Musa Kadhim and refutation of Waqifiya
44- قال وحدثني محمد بن عطاء ضرغامة عن خلاد اللؤلؤي قال حدثني سعيد المكي عن أبي عبد الله عليه السلام، وكانت له منزلة منه،قال: قال أبو عبد الله عليه السلام: يا سعيد،الأئمة اثنا عشر إذا مضى ستة فتح الله على السابع ويملك منا أهل البيت خمسة وتطلع الشمس من مغربها على يد السادس.
H 44 - Narrated to me Muhammad bin Ataa Zarghama from Khallad Lului that: Narrated to me Saeed Makki who was a close confidant of Imam Ja’far Sadiq ; that Imam said: O Saeed, the Imams are twelve; when six of them pass away, Allah, the Mighty and the High would give ease to the seven of them and five persons from us, Ahle Bayt will be Imams and through the sixth, sun would rise from the west.
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).