Musannaf Ibn Abi Shaybah

It is narrated from Hazrat Abdullah bin Shaddad that Kisra wrote to Bazan that: "I have been informed that there is a man who says things of which I have no knowledge. So send someone to him so that he may remain quiet in his house and not spread anything among the people, otherwise let him fix a time and place with me, I will meet him there." The narrator says: Bazan sent to the Messenger of Allah (peace and blessings be upon him) two men who had shaved beards and long mustaches. The Messenger of Allah (peace and blessings be upon him) said: "Who incited you to this?" The narrator says: Both of them submitted to him (peace and blessings be upon him): "He who, according to the people's assumption, is their Lord, has ordered us to do this." The narrator says: The Messenger of Allah (peace and blessings be upon him) said: "But we oppose your way. We trim this (the mustache) and let this (the beard) grow." The narrator says: A Qurayshi man with a long mustache passed by the Messenger of Allah (peace and blessings be upon him), so he (peace and blessings be upon him) ordered him: "Cut them." The narrator says: The Messenger of Allah (peace and blessings be upon him) kept those envoys for a little over twenty days. Then the Messenger of Allah (peace and blessings be upon him) said: "Both of you go to the one whom you consider your Lord and tell him that my Lord has killed that person who, in his own assumption, had made himself a lord." Those men asked: "When did this happen?" The Messenger of Allah (peace and blessings be upon him) said: "On this very day." The narrator says: So both of them went to Bazan and informed him of this. The narrator says: He wrote a letter to Kisra and found that Kisra's murder had occurred on that very day.