Among the shaykhs of the followers of Abu Abd Allah, 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 Ja’fars peace be on him, for his son, Abu al- Hasan
Musa, peace be on him, are: al-Mufaddal ibn Umar al-Jufi, Mu'adh ibn Kathir, Abd
al-Rahman ibn al-Hajjaj, al-Fayd ibn al-Mukhtar, Yaqub al-Sarraj, Sulayman ibn
Khalid, Safwan al-Jammal, and others whom it would make the book too long to
mention.
(That designation) is also reported by his two brothers, Ishaq and Ali, sons
of Ja’far, peace be on him. They were men of merit and piety and (therefore
reliable witnesses) in so far as two such men did not differ on it.
[Musa al-Sayqal reported on the authority of al-Mufaddal ibn Umar al-Jufi,
may God have mercy on him, who said:]
I (i.e. al-Mufaddal ibn Umar al-Jufi) was with Abu Abd Allah (Ja’far), peace
be on him. Abu Ibrahim Musa, peace be on him, came in. He was still a boy. Abu
Abd Allah Ja’far, peace be on him, said to him: “Indicate to those of your
Companions whom you trust that the position of authority belongs to him
Musa.”
[Thubayt reported on the authority of Muadh ibn Kathir, on the authority of
Abu Abd Allah Ja'far:]
I (i.e. Muadh ibn Kathir) said to (Ja’far): “I ask God, Who provided your
father with you for this position, to provide you with one of your offspring for
the same position before your death.”
“God has done that,” he answered.
“May I be your ransom, who is it?” I asked.
He indicated al-Abd al-Sarh (the pious worshipper of God) (i.e. Musa) to me.
He was asleep.
“This one who is sleeping,” he said. He was at that time a boy.
[Abu Ali al-Arrajani reported on the authority of Abd al Rahman ibn al
Hajjaj, who said:]
I (i.e. Abd al-Rahman ibn al-Hajjaj) visited Ja’far ibn Muhammad, peace be on
them, in his house. He was in such-and-such a room in his house which he used as
a prayer-room. He was praying there. On his right hand was Musa ibn Ja’far,
peace be on them, following his prayer.
“May God make me your ransom,” I said, “you know how I have dedicated my life
to you and (you know of) my service to you. Who is the master of the affair
(wali al-amr) after you?”
He said: “Abd al-Rahman, Musa has put on the armour and it fitted him.”
“After that, I have no further need of anything,” I replied.