Musannaf Ibn Abi Shaybah

It is narrated from Munzir bin Ya'la (may Allah be pleased with him) that on the day the rebels intended to kill Hazrat Uthman, Marwan sent a message to Hazrat Ali (may Allah be pleased with him) asking, "Will you not go to this person (Hazrat Uthman) and protect him? For he is not willing to accept anyone's decision except yours." Hazrat Ali (may Allah be pleased with him) replied, "We will certainly go to him." Then Ibn Hanafiyyah held his shoulder and intended to take responsibility for this task himself. He said, "O my father, where are you going? By Allah, those people will only increase in their fear of you." Then Hazrat Ali (may Allah be pleased with him) sent his turban towards the rebels and told them to refrain from harming Hazrat Uthman.