Saʿd, from Aḥmad b. Muḥammad b. ʿĪsā, from al-Ḥusayn b. Saʿīd, from Ḥammād b. ʿĪsā, from Ibrāhīm b. ʿUmar al-Yamānī, from Abī’l-Ṭufayl, from Abī Jaʿfar عليه السلام (from his forefathers), who said: “The Apostle of Allāh صلى الله عليه وعلى آله said to Amīr al-Muʾminīn عليه السلام: “Write down what I dictate to you.” He responded: “O’ Prophet of Allāh! Do you fear forgetfulness on my part?” The Prophet said: “I do not fear forgetfulness on your part, but I have supplicated to Allāh that He preserve you and ensure that you do not forget. Rather, I instruct you to write for the sake of your associates.” ʿAlī صلوات الله عليه stated: “I said: “Who are my associates, o’ Prophet of Allāh?!” The Prophet صلى الله عليه وعلى آله responded: “The Imams from among your posterity, through whom my community is blessed with rain, through whom their supplications are answered, through whom Allāh turns afflictions away from them, and through whom He sends mercy down from the sky. This is the first of them”—and he gestured towards al-Ḥasan, and then he gestured towards al-Ḥusayn عليهما السلام—then he said: “The (remaining) Imams are from among his descendants عليهم السلام.”