ʿUthman bin 'Affan looked at them when they spoke of killing. He said: “Are they kill threatening to kill me? 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 commits adultery when he is a married person, then he should be stoned; a man who kills a soul not in retaliation for murder; and a man who apostatizes after becoming Muslim.' By Allah (SWT), I never committed adultery either during Ignorance days nor in Islam, and I have never killed a Muslim soul, and I have not apostatized since I became Muslim.”  

إِنَّهُمْ لَيَتَوَاعَدُونِي بِالْقَتْلِ فَلِمَ يَقْتُلُونِي وَقَدْ سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ لا يَحِلُّ دَمُ امْرِئٍ مُسْلِمٍ إِلاَّ فِي إِحْدَى ثَلاَثٍ رَجُلٌ زَنَى وَهُوَ مُحْصَنٌ فَرُجِمَ أَوْ رَجُلٌ قَتَلَ نَفْسًا بِغَيْرِ نَفْسٍ أَوْ رَجُلٌ ارْتَدَّ بَعْدَ إِسْلاَمِهِ فَوَاللَّهِ مَا زَنَيْتُ فِي جَاهِلِيَّةٍ وَلاَ فِي إِسْلاَمٍ وَلاَ قَتَلْتُ نَفْسًا مُسْلِمَةً وَلاَ ارْتَدَدْتُ مُنْذُ أَسْلَمْتُ  

“It is not lawful to shed the blood of a Muslim who bears witness that none has the right to be worshiped but Allah (SWT), and that I am the Messenger of Allah ﷺ, except in one of three cases: a soul for a soul; a married person who commits adultery, and one who leaves his religion and splits from the Jamaʿah.”  

قَالَ رَسُولُ اللَّهِ ﷺ لاَ يَحِلُّ دَمُ امْرِئٍ مُسْلِمٍ يَشْهَدُ أَنْ لاَ إِلَهَ إِلاَّ اللَّهُ وَأَنِّي رَسُولُ اللَّهِ إِلاَّ أَحَدُ ثَلاَثَةِ نَفَرٍ النَّفْسُ بِالنَّفْسِ وَالثَّيِّبُ الزَّانِي وَالتَّارِكُ لِدِينِهِ الْمُفَارِقُ لِلْجَمَاعَةِ