Musnad Ahmad Hadith 438

We were with ‘Uthman when he was under siege in the house. He went to the entrance of the house, from which his words could be heard in alBalat. He went to that entrance, then came out to us and said:They were threatening to kill me just now. We said: Allah will suffice you against them. O Ameer al-Mu`mineen. He said: Why would they kill me? I heard the Messenger of Allah (ﷺ) say: `It is not permissible (to shed) the blood of a Muslim except in three cases: if a man disbelieves after becoming Muslim, or commits zina after being married, or kills someone and is executed in return.” By Allah, I have never wished to change my religion after Allah guided me; I never committed zina either during the Jahiliyyah or in Islam; and I have never killed anyone. So why would they kill me Abu Umamah bin Sahl bin Hunaif narrated: I was with `Uthman (رضي الله عنه) in the house when he was under siege. We would enter through an entrance... and he narrated a similar hadeeth. And he said: I heard the Messenger of Allah (ﷺ) say:... and he narrated a similar hadeeth,