Sahih al-Bukhari 7079
Sahih al-Bukhari · Book 92: Afflictions and the End of the World · “Do not renegade as disbelievers after me by striking the neck of one another.”
Narrated Ibn `Abbas:
حَدَّثَنَا أَحْمَدُ بْنُ إِشْكَابٍ ، حَدَّثَنَا مُحَمَّدُ بْنُ فُضَيْلٍ ، عَنْ أَبِيهِ ، عَنْ عِكْرِمَةَ ، عَنِ ابْنِ عَبَّاسٍ ـ رضى الله عنهما ـ قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم " لاَ تَرْتَدُّوا بَعْدِي كُفَّارًا، يَضْرِبُ بَعْضُكُمْ رِقَابَ بَعْضٍ " .
The Prophet (ﷺ) said, "Beware! Do not renegade as (disbelievers) after me by striking (cutting) the necks of one another."