The Book of Occultation — al-Ṭūsī · Hadith 410 (#Ḥadīth #11)
Chapter 34 | Evidence of the Birth of the Master of the Age
203- وبهذا الاسناد، عن عمرو الاهوازي قال:أراني أبو محمد عليه السلام إبنه وقال:هذا صاحبكم من بعدي.
H 203 - From the same chains of narrators, it is narrated from Amr Ahwazi that he said: Abu Muhammad showed me his son and said: “This is your master after me.”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).