4-26 In another tradition it is narrated that (The author of the book narrated) my father - may God be pleased with him - narrated that Sa’d ibn Abdullah quoted on the authority of Ahmad ibn Muhammad ibn Isa, on the authority of Abdullah ibn Muhammad al-Hajjal, on the authority of Sa’eed ibn Abil Jahm, on the authority of Nasr ibn Qaboos that he told Abi Ibrahim Musa ibn Ja’far (s), “I asked your father (s) ‘Who is going to be your successor?’ Your father (s) informed me that you were his successor. When Abu Abdillah (s) passed away each group of people went on different ways. But my friends and I believed in you. Then please inform me about whom your successor will be.” Musa ibn Ja’far (s) said, “My son Ali.”