Imamate is not Rightfully Invested except In the Descendants of al-Ḥusayn to the Exclusion of the Descendants of al-Ḥasan عليهما السلام

And from him, from ʿAlī b. Ismāʿīl, and Ayyūb b. Nūḥ, from Ṣafwān b. Yaḥyā, from al-ʿAys b. al-Qāsim, from al-Muʿallā b. Khunays, who said: “Abū ʿAbd Allāh عليه السلام said: “There is no Prophet, Legatee or Sovereign but that he is (mentioned) in a book I have. And by Allāh, no, the name of Muḥammad b. ʿAbd Allāh b. al-Ḥasan is not in it.”