The traditions that indicate he is from the descendants of Imam Abū l-Ḥasan `Alī b. Muḥammad b. `Alī b. Mūsā al-Riḍā, peace be on him
Comprised of 107 traditions
558. Kamāl al-dīn1: Narrated to us Aḥmad b. Ziyād Ja`far al-Hamdānī, may Allah be satisfied with him, from `Alī b. Ibrāhīm, from `Abd-Allah b. Aḥmad al-Mauṣilī, from al-Ṣaqr b. Abī Dulaf, from (Imam) `Alī b. Muḥammad b. `Alī al-Riḍā, peace be on him, who said: “The Imam after me is al-Ḥasan, my son, and after al-Ḥasan will be his son, the Qā’im, who will fill the earth with fairness and justice just as it will be filled with injustice and unfairness.”
559. Kamāl al-dīn2: Narrated to us `Abd al-Wāḥid b. Muḥammad b. al-`Abdūs al-`Aṭṭār, may Allah be satisfied with him, from `Alī b. Muḥammad b. Qutayba al-Nīsābūrī, from Ḥamdān b. Sulaimān, from al-Ṣaqr b. Abū Dulaf, who said:
I heard (Imam) Abū Ja`far Muḥammad b. `Alī al-Riḍā, peace be on him, say, “The Imam after me is my son `Alī. His affair is my affair (amruhū amrī), his speech is my speech, and his obedience is my obedience. The Imam after him will be his son al-Ḥasan. His affair is the affair of his father, his speech is the speech of his father, and his obedience is the obedience of his father.”
Then, he became silent. I asked him, “O Son of Allah’s Messenger! Who is the Imam after al-Ḥasan?” [On hearing this], he started weeping violently and said, “Verily, after al-Ḥasan will be his son who will rise with the truth; the awaited one (al-muntaẓar).” I asked, “O Son of Allah’s Messenger! Why is he called the one who will rise (al-Qā’im)?” He answered, “Because he will rise after he is no longer remembered and after most of those who had believed in his Imamate will no longer believe in him.”
I enquired, “Why is he called the awaited one (al-muntaẓar)?” He replied, “Because he will be in an occultation which will continue for many days and long periods. The purified ones (al-mukhliṣūn) will wait for his reappearance, the skeptics will renounce him, and the deniers will make fun when he is mentioned. Those who determine the time [of his reappearance] will be liars, those who hasten concerning his reappearance will perish, and only those who submit will be saved.”
The traditions with the following numbers also show the aforementioned concept: 242–308, 558–571, 608, 641, 786–807, 859, and 1230.