The traditions that indicate he is from the descendants of Imam Muḥammad b. `Alī, al-Riḍā, peace be on him
Comprised of 109 traditions
557. Kamāl al-dīn1: Narrated to us Aḥmad b. Mūsā al-Daqqāq, may Allah be satisfied with him, from Muḥammad b. Hārūn al-Ṣūfī, from Abū Turāb `Abd-Allah b. Mūsā al-Rūyānī, from `Abd al-`Aẓīm b. `Abd-Allah b. `Alī b. al-Ḥasan b. Zaid b. al-Ḥasan b. `Alī b. Abī Ṭālib, peace be on him, who said: I went to see my master (Imam) Muḥammad b. `Alī b. Mūsā b. Ja`far b. Muḥammad b. `Alī b. al-Ḥusayn b. `Alī b. Abī Ṭālib, peace be upon them, with the intention of asking him about the Qā’im [and to see] if he is the Mahdī or not? He initiated the conversation [before I asked the question] and said, “O Abū l-Qāsim! Surely the Qā’im from us is the Mahdī who must be awaited during his occultation and obeyed when he reappears.
He is my third descendant. I swear by the One Who sent Muḥammad with prophethood and distinguished us with leadership (imāma), if nothing remains from this world except one day, Allah will certainly prolong that day until he emerges in it and fills the earth with fairness and justice just as it will be filled with injustice and unfairness. Surely Allah, Blessed and High be He, will set right his affairs in one night just as He set right the affairs of Moses—the one he spoke with (kalīmuhū)—when he went to bring fire for his family but returned while he was a Prophet.” Then he said, “The best deed of our Shias is to wait for relief (intiẓār al-faraj).”
The traditions with the following numbers also show the aforementioned concept: 242–308, 558–571, 608, 641, 786–807, 859, 973, and 1230.
1. Kamāl al-dīn, vol. 2, p. 377, no. 1; Kifāyat al-athar, chap. 37, pp. 280–281, no. 1; I`lām al-warā, sect. 2, chap. 2; Ithbāt al-hudāt, vol. 3, chap. 27, sect. 2, p. 386, no. 19; Biḥār al-anwār, vol. 51, chap. 9, p. 156, no. 1.