Abu Umama bin Sahl reported,

We were with Uthman while he was besieged in his house. He entered a chamber from which, whenever he was inside it, his speech could be heard from the courtyard pavement. He went into that chamber and then came out to us and said, "They have just been threatening to kill me."We replied, "Allah will suffice you against them, Commander of the Believers."He said, "On what grounds would they kill me? I heard the Messenger of Allah ﷺ say, 'The blood of a Muslim is not lawful except in one of three cases, a man who disbelieves after his Islam, or commits adultery after marriage, or kills a person and is killed for it.' By Allah, I have never wished to exchange my religion for any other since Allah guided me, nor have I ever committed adultery, neither in the days of ignorance nor in Islam, nor have I killed anyone. So on what grounds would they kill me?"

حدثنا سليمان بن حرب وعفان المعنى قالا حدثنا حماد بن زيد حدثنا يحيى بن سعيد

عن أبي أمامة بن سهل قال

كنا مع عثمان رضي الله عنه وهو محصور في الدار فدخل مدخلا كان إذا دخله يسمع كلامه من على البلاط قال فدخل ذلك المدخل وخرج إلينا فقال إنهم يتوعدوني بالقتل آنفا قال قلنا يكفيكهم الله يا أمير المؤمنين قال وبم يقتلونني إني سمعت رسول الله ﷺ يقول لا يحل دم امرئ مسلم إلا بإحدى ثلاث رجل كفر بعد إسلامه أو زنى بعد إحصانه أو قتل نفسا فيقتل بها فوالله ما أحببت أن لي بديني بدلا منذ هداني الله ولا زنيت في جاهلية ولا في إسلام قط ولا قتلت نفسا فبم يقتلونني