It is narrated from Hazrat Umair bin Ishaq that he said: I and another man went to visit Hazrat Hasan bin Ali (may Allah be pleased with him). Hazrat Hasan bin Ali (may Allah be pleased with him) said to that man, "Ask me before you are unable to ask me." That person said, "I do not want to ask you anything. May Allah grant you well-being." The narrator said: Hazrat Hasan stood up and entered the toilet, then came back to us and said, "I did not come out to you until I had thrown out a piece of my liver, which I was turning over with this stick. I have been given poison many times, but nothing was as severe as this time." Hazrat Umair said: The next day we went to him in the morning, and he was in the throes of death. The narrator Umair said: Hazrat Husain came and sat by his head and said, "O brother, who gave you the poison?" He replied, "Do you want to kill him?" He said, "Yes." Hazrat Hasan said, "If it is the one whom I suspect, then Allah will punish him severely, and if he is innocent, then I do not like that an innocent person should be killed."