H 198 - Narrated Muhammad bin Yaqub from Husain bin Muhammad Ashari from Mualla Ibn Muhammad from Ahmad bin Muhammad that:

When Zubairi was killed, a letter came from Imam Hasan Askari as follows: “This is the punishment of one who attributes lies to Allah, the Exalted, with respect to His close friends. He presumed that he would kill me while I do not have an offspring. So how did he witness the might of Allah?” He sired a son and named him Muhammad. This was in the year two hundred and fifty-six.