Designation of the Imamate, Imamat or Khilafat
Designation of the Imamate
Musa al-Kazim became the seventh Shi’ah Imam after his father was assassinated by the Abbasids, Musa al-Kazim was 21 years old.
According to "Ketab Al Irshad" of Sheikh al-Mufid:
"Among the shaykhs of the followers of Abu Abd Allah Ja'far al-Sadiq, peace be on him, his special group (khassa), his inner circle and the trustworthy righteous legal scholars, may God have mercy on them, who report the clear designation of the Imamate by Abu Abd Allah Jafars peace be on him, for his son, Abu al-Hasan Musa, peace be on him, are: al-Mufaddal b. Umar al-Jufi, Mu'adh b. Kathir, Abd al-Rahman b. al-Hajjaj, al-Fayd b. al-Mukhtar, Yaqub al-Sarraj, Sulayman b. Khalid, Safwan al-Jammal...[That designation] is also reported by his two brothers, Ishaq and Ali, sons of Jafar, peace be on him[1]."
Musa al-Kazim was not the eldest son Ja'far al-Sadiq, Ismail bin Jafar was, whose supporters split from mainstream Shi'ah on that grounds, forming the Ismaili branch of Shi'ah Islam. There are two narrations about Ismail. One said he died before his father, Ja'far al-Sadiq, another said to protect him from persecution, his father sent him into hiding and publicly declared him deceased. Twelver Shi’ahs believe that Ismailis are on a mistake because Imams are selected by Allah, and therefore there shouldn’t be any elections for the position of an Imam nor the age of the Imam matters.
Ja'far: Sure, I'll be glad to. First I will quote the Book of Allah (Quran):
First Proof:
Whatever has been mentioned under the explanation of the verse of 'Warning'.
And warn you nearest relatives. (Surah Shoara 26:214).
According to traditions when the above verse was revealed the Messenger of Allah (s.a.w.s.) was ordered by the Almighty to invite his relatives towards Islam. He summoned his relations and said,
"Whoever among you agrees to cooperate with me in this matter will be my brother, my successor and my vicegerant."
Everyone remained silent but Ali (a.s.) stood up and said,
"I will help you O Messenger of Allah."
The Messenger of Allah (s.a.w.s.) said pointing towards Ali (a.s.),
"This is my brother, and my Successor and my Caliph among you. So listen to him and obey him."
The people stood up and in jest said to Abu Talib, "You have been ordered to listen to and obey your son." (Tarikh Tabari)
Second proof: The verse of Wilayat
"Only Allah is your Vali and His Apostle and those who believe, those who keep up prayers and pay the poor-rate while they bow." (Surah Maidah 5:55)
All the Muslims agree that this ayat was revealed for Imam Ali Ibne Abi Talib (a.s.) when in the state of Ruku he gave his ring in charity to a beggar. Quranic commentaries mention that the word 'innama' used in the above ayat indicates that wilayat is confined first to Allah the Almighty, secondly to the Holy Prophet (s.a.w.s.) and thirdly to Imam Ali ibne Abi Talib (a.s.). It cannot be generalised to include all those who give charity in the state of Ruku.
Third proof: The verse of Purification
"Allah only desires to keep away the uncleanness from you, O people of the House! And to purify you a (thorough) purifying." (Surah Ahzab 33:33)
All the Shia Tafsirs and the majority of the Sunni commentaries agree that this holy verse was revealed for the Messenger of Allah (s.a.w.s.), Ali Ibne Abi Talib (a.s.), Fatimah Zahra (s.a.), Hasan (a.s.) and Husain (a.s.) when the Messenger of Allah (s.a.w.s.) had called them and covered them with a blanket. Then he (s.a.w.s.) had raised up his hands in prayers and invocated the Almighty,
"O Allah, these are my Ahle Bayt, take away impurities from them and purify them a thorough purification."
The Almighty Allah purified them from all impurities of sin. This announcement could not have come if there had not been complete purity in the Ahle Bayt (a.s.). The Holy Prophet (s.a.w.s.) was also completely safe from error or sin, hence he attainted the lofty position of prophethood. Similarly his Ahle Bayt who were to succeed him as Imams (a.s.) were also immune from sin.
(Sunan Tirmidhi Vol. 2, Pg. 308)
There are many other ayats that convey this concept.
Sulaiman: Is it possible for you to mention some traditions in support of Imamate?
Hadith al-Manzilah and vicegerancy:
The Messenger of Allah (s.a.w.s) told Ali (a.s.),
"Are you not satisfied that you are having the same position to me as Haroon (a.s.) was having with Musa (a.s.) except that there is no prophet after me. It is not possible that I go away without leaving you as my successor." (Seerah Ibne Hisham, Vol III, Pg. 520)
Hadith of Ghadeer:
On the eight of Zilhajj when the Messenger of Allah (s.a.w.s.) declared among the multitude of Haajis at Ghadeer near the miqaat of Johfa,
"Am I not having more authority on the believers than they have over themselves?
They replied, "Yes, O, Messenger of Allah (s.a.w.s.)." The Holy Prophet (s.a.w.s.) raised the hands of Ali (a.s.) and said,
"Of whomsoever I am the maula, this Ali is his maula too. And of whomsoever I am the guardian, this Ali is his guardian too. O, Allah love those who love him and be inimical to one who is inimical to him." (Sahih Tirmidhi Vol. 2 Pg. 298)
Hadith of Thaqlayn:
The Messenger of Allah (s.a.w.s.) said,
"I leave among you those things that if you remain aligned to them you will never go astray. One of them is greater than the book of Allah and my progeny my Ahle Bayt. They will not separate till they arrive at the pool (Kauthar). So beware how you behave with them."
(Al Ittehaaf be Hubbil Ashraaf Pg. 22)
(Kanzul Ummal, Vol. 6, Pg. 216)
Source : http://www.oneummah.net/understand/imamat_or_khilafat.htm
