The Book of Occultation — al-Ṭūsī · Hadith 614 (#Ḥadīth #1)

ذكر أمر أبي الحسن علي بن محمد السمري بعد الشيخ أبي القاسم الحسين بن روح رضي الله عنه وانقطاع الأعلام به وهم الأبواب:

After Shaykh Abul Qasim Husain bin Rauh, Abul Hasan Ali bin Muhammad Saymoori succeeded to the post of the deputyship of Imam Mahdi and with his death ended the special deputyship of Imam . Only these four were channels of contact with the Imam of the Time .

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