Sahih Muslim Book - 28, Hadith - 4377

حَدَّثَنَا أَحْمَدُ بْنُ حَنْبَلٍ وَمُحَمَّدُ بْنُ الْمُثَنَّى - وَاللَّفْظُ لأَحْمَدَ - قَالاَ حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ مَهْدِىٍّ عَنْ سُفْيَانَ عَنِ الأَعْمَشِ عَنْ عَبْدِ اللَّهِ بْنِ مُرَّةَ عَنْ مَسْرُوقٍ عَنْ عَبْدِ اللَّهِ قَالَ قَامَ فِينَا رَسُولُ اللَّهِ -صلى الله عليه وسلم- فَقَالَ « وَالَّذِى لاَ إِلَهَ غَيْرُهُ لاَ يَحِلُّ دَمُ رَجُلٍ مُسْلِمٍ يَشْهَدُ أَنْ لاَ إِلَهَ إِلاَّ اللَّهُ وَأَنِّى رَسُولُ اللَّهِ إِلاَّ ثَلاَثَةُ نَفَرٍ التَّارِكُ الإِسْلاَمَ الْمُفَارِقُ لِلْجَمَاعَةِ أَوِ الْجَمَاعَةَ - شَكَّ فِيهِ أَحْمَدُ - وَالثَّيِّبُ الزَّانِى وَالنَّفْسُ بِالنَّفْسِ ».قَالَ الأَعْمَشُ فَحَدَّثْتُ بِهِ إِبْرَاهِيمَ فَحَدَّثَنِى عَنِ الأَسْوَدِ عَنْ عَائِشَةَ بِمِثْلِهِ.

It was narrated that 'Abdullah said: "The Messenger of Allah (s.a.w) stood up among us and said: 'By the One besides Whom none has the right to be worshiped! It is not permissible to shed the blood of a Muslim man who testifies that none has the right to be worshiped but Allah and that I am the Messenger of Allah, except in three cases: One who leaves Islam abandoning the Jama'ah (the congregation of Muslims), a married (or previously married) adulterer, and a life for a life."' Al-A'mash said: I narrated it to Ibrahim, and he narrated a similar report from Al-Aswad, from 'Aishah.