مسند امام احمد بن حنبل · Hadith 1402

Muhammad bin 'Abdur- Rahman bin Mujabbar narrated from his father, from his grand- father, that 'Usman (RA) looked out at those who were besieging him. He greeted them with salam but they did not respond to him. 'Usman (RA) said: Is Talha among the people? Talha said: Yes. He said: Verily, to Allah we belong and unto Him is our return! I greet people among whom you are and they do not return the greeting! Talha said: I returned the greeting. 'Usman said: This is not the way to return the greeting. I made you hear me but you did not make me hear you. O Talha, I adjure you byAllah, did you hear the Prophet (PBUH) say: "The blood of a Muslim is not permissible except in one of three cases: if he disbelieves after believing, or he commits zitia after having been married, or he kills a soul and may be killed in return." Talha said: Yes, by Allah. 'Usman said takbeer , then he said: By Allah, I have never denied Allah since I came to know Him. 1 never committed zina during the Jahiliyyah or in Islam. I abstained during the jahiliyyah because I hated it and in Islam so as to maintain my chastity. And I have never killed anyone in return for which killing me would become permissible.