Muhammad bin al-Hasan bin Imara said, “Once, I was with Ali bin Ja’far in Medina, where I stayed with him for two years to write down what he had heard from his brother (Imam Musa al-Kadhim), when one day Abu Ja’far Muhammad bin Ali (al-Jawad) (a.s) came into the mosque of the messenger of Allah (a.s). Ali bin Ja’far suddenly jumped without shoes or garment and kissed his hand and glorified him. Imam al-Jawad (a.s) looked at him and said, ‘O uncle, sit down please! May Allah have mercy on you.’
Ali bin Ja’far bowed respectfully and said, ‘O my master, how can I sit while you are standing?’
Imam al-Jawad (a.s) went away and then Ali bin Ja’far returned to his companions. They began scolding him for glorifying Imam al-Jawad (a.s) who was very young yet. They said to him, ‘You are the uncle of his father, so why did you act in that way with him?’
He answered them with the answer of one who believed in his Lord and religion and who recognized the actual position of the imamate. He said to them, ‘Keep silent! It is Allah Who has not qualified this beard (he caught his beard with his hand) for the imamate and has qualified this young man and placed him in that position according to His will. We seek the protection of Allah from what you say. I am just a slave to him (to Imam al-Jawad).’” ( Bihar al-Anwar, vol. 12 p.117, Usool al-Kafi, vol. 1 p.380.)