Original sentence: His father Imam Ismāʿīl died during the lifetime of Imam Ja'far as-Sadiq.Idris Imad al-Din, the 19th Dai of Tayyibis (d 872 AH), in the book, ‘Zahr al Ma’ani’, says that Imam al-Sadiq (as) appointed Musa al-Kadhim as his successor, but his goal in doing so was to protect the Imamate of Muhammad Ibn Ismail
Edited sentence: His father Isma'il ibn Jafar died during the lifetime of Ja'far al-Sadiq.Isma'ili scholars reject this Twelver interpretation of the book Zahr al Ma'ani, instead believing that the Imam does not have the power to cancel, revoke, or alter an appointment of succession.Some Twelver scholars believe that Idris Imad al-Din, an Isma'ili and the 19th Dai of Tayyibis (d 872 AH), in the book, ‘Zahr al Ma’ani’, says that Ja'far al-Sadiq appointed Musa al-Kadhim as his successor, and that his goal in doing so was to protect the Imamate of Muhammad Ibn Ismail.Therefore, according to Isma'ili doctrine, the original appointment of Isma'il ibn Jafar cannot be changed as Isma'il acquired the spiritual power of the Imamate, and the Imamate would continue in his lineage