"His father Imam Ismāʿīl died during the lifetime of Imam Ja'far as-Sadiq.Syedna Idris Imad al-Din, the 19th Dai al Mutlaq of the Taiyabi (died 872 AH or 1468 AD), in his book, ‘Zahr al Ma’ani’, he says that Imam Jafar as-Sadiq appointed Musa al-Kadhim as his successor after appointing Imam Ismāʿīl al-Mubārak, but his goal in doing so was to protect the Imamate of Imam Muhammad Ibn Ismail.