The one who was entitled through the last Imam has more...
The one who was entitled through the last Imam has more right to his position than anyone else through the evidence of the verse of next of kin (dhu al- arhaim) and the (Qur'anic) story of Zacharia, peace be on him. Another of (the facts which confirms his Imamate) is the necessity according to reason of the Imamate existing in every age. The claim of every (other) claimant to the Imamate during the time of Ali b.
al- Husayn, peace be on them, was invalid and the impossibility of there being any time without an Imam is confirmed by him (being the Imam). Another (of the facts which confirms his Imamate) is the fact that the Imamate is established in the offspring (itra) (of the family of Ali exclusively by rational deduction and by a report on the authority of the Prophet, may God bless him and his family. Invalidity of the arguments of those who claim it for Muhammad b.
al-Hanafiyya, may God be pleased with him, through him (also) belonging to the offspring is established by the absence of the designation of it to him. Therefore it is established that it belongs to Ali b. al-Husayn, peace be on them, since there was no claim for it for any other member of the offspring (of the family) except Muhammad, may God be pleased with him; his exclusion from it was on account of what we have already mentioned.
Another (of the facts which confirmed his Imamate) was the designation of the Apostle of God, may God bless him and his family, of him for the Imamate, in the tradition which is related concerning the tablet (lawh) which Jabir reported on the authority of the Apostle of God, may God bless him and his family. Muhammad b.
Ali al- Baqir, peace be on them, (also) related it on the authority of his father, on the authority of his grandfather, on the authority of Fatima, daughter of the Apostle of God, may God bless him and his family. His grandfather, the Commander of the faithful, peace be on him, designated him during the life-time of his father, al-Husayn, peace be on him, according to the reports which include that. The testamentary bequests (wasiyya) (were made) by his father, al- Husayn b.
Ali, peace be on him, and they were deposited with Umm Salama for him. He received them when his father died. His father made the request (for these) from Umm Salama, the sign of the Imamate of the one who should request them among men.