Abu Umama bin Sahl reported,

I was with Uthman in the house while he was under siege. We used to enter through a passage from which, once inside, we could hear what people were saying out on the paved courtyard.One day Uthman went out for some need and returned to us with his color drained. He said, "They have just been threatening to kill me."We said, "Allah will suffice you against them, Commander of the Believers."He said, "But why would they kill me? I heard the Messenger of Allah ﷺ say, 'It is not lawful to shed the blood of a Muslim except in one of three cases, a man who disbelieves after his Islam, or commits adultery after marriage, or kills a soul other than in retaliation for a soul.' By Allah, I never committed adultery, neither in the days of ignorance nor in Islam, nor have I ever wished for any religion in exchange for mine since Allah guided me, nor have I killed anyone. So for what would they kill me?"

حدثنا عفان حدثنا حماد بن زيد حدثنا يحيى بن سعيد

عن أبي أمامة بن سهل قال

كنت مع عثمان رضي الله عنه في الدار وهو محصور قال وكنا ندخل مدخلا إذا دخلناه سمعنا كلام من على البلاط قال فدخل عثمان يوما لحاجة فخرج إلينا منتقعا لونه فقال إنهم ليتوعدوني بالقتل آنفا قال قلنا يكفيكهم الله يا أمير المؤمنين قال فقال وبم يقتلوني فإني سمعت رسول الله ﷺ يقول إنه لا يحل دم امرئ مسلم إلا في إحدى ثلاث رجل كفر بعد إسلامه أو زنى بعد إحصانه أو قتل نفسا بغير نفس فوالله ما زنيت في جاهلية ولا إسلام ولا تمنيت بدلا بديني مذ هداني الله عز وجل ولا قتلت نفسا فبم يقتلوني