It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that during the days when Sayyiduna Uthman (may Allah be pleased with him) was besieged in his house, he looked out at the people and said: "For what crime do you intend to kill me? For I heard the Prophet (peace and blessings be upon him) say that it is not lawful to shed the blood of a Muslim except in one of three cases: a man who becomes an apostate after accepting Islam, or a married person who commits adultery, or a murderer who is killed in retaliation for the one he killed. By Allah! Since Allah has guided me, I have never become an apostate. As for adultery, not only in Islam, even in the days of ignorance I never committed it, nor have I killed anyone for whom retribution should be taken from me."