Ja’far Ibn Muhammad Ibn Umar and a number of others came to Askar and were present there during the time Imam Hasan Askari (a.s) was alive. Amongst them was Ali Ibn Ahmad Ibn Tanin. Ja’far Ibn Muhammad Ibn Umar wrote a letter asking permission to enter the tomb. Ali Ibn Ahmad said to him, “Do not write my name. I am not seeking permission.” Ja’far Ibn Muhammad did not write his name and the reply came, “Enter you and the one who did not seek permission.”