He said to me...
He said to me: O Mufaddal, the Imam after me is my son, Musa and the Imam who will be expected and awaited for is M-H-M-D son of Hasan son of Ali son of Muhammad son of Ali son of Musa.” 5 -Narrated to us Ali bin Ahmad bin Abdullah bin Ahmad bin Abi Abdullah Barqi: Narrated to us my father from my grandfather Ahmad bin Abi Abdullah from his father Muhammad bin Khalid from Muhammad bin Sinan and Abi Ali Zarrad, all of them from Ibrahim Al-Karkhi that he said: “I went to Abu Abdillah Ja’far Ibn Muhammad Al-Sadiq (a.s.) and was sitting in his presence when Abu Al-Hasan Musa Ibn Ja’far (a.s.) entered while he was a boy.
I stood up, kissed him and sat with him. Then Abu Abdillah (a.s.) remarked, “O Ibrahim! Know that, he is your master after me. Know that, concerning him one group will be destroyed while another will be saved. Then may Allah curse his killer and multiply His chastisement for the one who fights against him. Know that, certainly Allah will bring out from his progeny the best of the inhabitants of the earth in his time.
He will be named after his grandfather, he will be the inheritor of this knowledge and his laws in his judgments, the treasure- chest of Imamate and the fountainhead of wisdom. The tyrant king of Bani (Abbas) will kill him after his amazing acts, due to envy. But Allah (Mighty and Glorified be He) will convey His affairs even if the polytheists dislike it. And Allah will bring forth from his progeny the completion of twelve Mahdi (guided leaders).
Allah has chosen them for His nobility, permitted for them the abode of His Holiness and the twelfth awaited one is from them, as if with an open sword standing in front of the Messenger of Allah (S) in his defense.” Then a person from the friends of Bani Umayyah entered due to which Imam had to cut short his speech. I returned to Abu Abdillah (a.s.) eleven times after that so that he may complete his discourse but he was unable to do so.
In the coming year, which was the second year, I went to him while he was sitting. He said, “O Ibrahim! He is the one who will provide salvation to his Shias after intense straitening, lengthy calamities, grief and fear. Then congratulations to one who lives till his time.