Imam Khomeini showed patience following Hajj Agha Mustafa’s martyrdom

It has been described through a series of memoirs that Imam Khomeini showed a great amount of patience following the martyrdom of his son Hajj Agha Mustafa.

ID: 52843 | Date: 2018/03/27
It was around Dhuhr on the day that Marhum Hajj Agha Mustafa had passed away. Imam’s house was full of people who had come to offer their condolences.  When everyone had left, the Adhaan of Dhuhr was heard.  Imam got up and went to do wudu and said: “I am going to the mosque.”  I said: “Oh, Agha is not leaving his habit of praying congregational prayers even today.”  I then said to one of the servants: “Quickly go and let the caretaker of the mosque know.”
When the people realised that Imam was going to the mosque, crowds of people from all over also flocked there.  When we reached the mosque with Agha, the people who were crying and wailing opened the way and the Imam entered the mosque.  The people remarked to each other with surprise: “What is this?  Imam is not crying at all.”

( A memoirs by Hujjatul Islam Furqani)

I was scared that I would cry for other than Allah

On the night of the martyrdom of Marhum Hajj Agha Mustafa, a Fatiha majlis (a service of prayer and condolence) took place in the Hindi Mosque in Najaf, and Agha Sayyid Jawad Shabbar recited from the pulpit.  He narrates:
In that majlis in which Imam was also present, I narrated the masaib of Hazrat Ali Akbar (as), and also mentioned it 7 times from the pulpit, connecting it to my lecture. Imam sat throughout the majlis with complete calm. 
Agha Sayyid Jawad Shabbar had wanted to make the Imam cry with these narrations so that his heart would become light, but he wasn’t successful despite the fact that it (the death of his son) was a major calamity.  A number of people who witnessed the Imam’s state thought that Imam was not crying because he was in a state of shock from the heavy calamity.  Therefore, after the majlis they went to the Imam who had returned home and asked: “Agha, you didn’t cry at the masaib today?”  He replied: “When he was reciting themasaib he was looking at me, and I was scared that if I cry it would be for other than Allah, i.e. it would be for the tragedy of my son, and not for the pleasure of Allah.” 
(A memoirs by Hujjatul Islam Sayyid Murtaza Musawi Ardabili Abarkuhi)