ʿUyūn akhbār al-Riḍā 1, narration 42

Translation

5-4 Ahmad ibn Ziyad ibn Ja’far al-Hamadani - may God be pleased with him - narrated that Ali ibn Ibrahim ibn Hashem quoted on the authority of his father, on the authority of Bakr ibn Salih that he asked Ibrahim ibn Al-Hassan Musa ibn Ja’far (s) , “What do you say about our father?” Ibrahim ibn Al-Hassan Musa ibn Ja’far (s) said, “He is alive.” Bakr ibn Salih asked him, “What do you say about your brother Abil Hassan (Imam al-Rezxa) (s)?” He said, “He is trustworthy and honest.” Then Bakr ibn Salih said, “He believes that your father has died.” He said, “He knows best what he says.” Bakr ibn Salih repeated what he had said. He said the same thing again. Then Bakr ibn Salih asked, “Has your father appointed anyone as his Trustee?” He said, “Yes.” Bakr ibn Salih asked, “Who?” He said, “The five of us, and he established Ali superior to us.”

Translation: Dr. Ali Peiravi — published with the edition, reproduced verbatim.