The Book of Fighting [The Prohibition of Bloodshed]
37/29. Chapter:
The Prohibition of Killing
Sunan an-Nasai
أَخْبَرَنَا أَحْمَدُ بْنُ عَبْدِ اللَّهِ بْنِ الْحَكَمِ، قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنْ وَاقِدِ بْنِ مُحَمَّدِ بْنِ زَيْدٍ، أَنَّهُ سَمِعَ أَبَاهُ، يُحَدِّثُ عَنِ ابْنِ عُمَرَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " لاَ تَرْجِعُوا بَعْدِي كُفَّارًا يَضْرِبُ بَعْضُكُمْ رِقَابَ بَعْضٍ " .
It was narrated from Ibn 'Umar that : The Prophet [SAW] said: "Do not revert to disbelievers after I am gone, striking the necks of one another (killing one another)."
Reference : Sunan an-Nasa'i 4125In-book reference : Book 37, Hadith 160English translation : Vol. 5, Book 37, Hadith 4130