However, as per Dastur al-Munajjimin, he was born in 121 AH/November 739 AD.

However, as per Dastur al-Munajjimin, he was born in 121 AH/November 739 AD.[^13] Muhammad was 14 years old when his father Ismail died, and since Ismail predeceased his father Imam al-Sadiq (as) by some 12 years, around 136 AH.

Hence, he was around 26 years old when Imam al-Sadiq (as) was martyred.[^14] 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.[^15] Dr.

Zahid Ali quotes Idris Imad al-Din, the 19th Dai of Tayyibis, “Imam Musa al-Kadhim’s mother was a slave, and an Imam cannot be born to a slave girl; whereas the mother of Muhammad Ibn Ismail was not a slave girl.”[^16] It is strange that there is not much…