Sahih al-Bukhari 7079
Book 92: Afflictions and the End of the World · Narrated by Ibn `Abbas
Arabic
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 ".
English translation
Narrated Ibn `Abbas:The Prophet (ﷺ) said, "Beware! Do not renegade as (disbelievers) after me by striking (cutting) the necks of one another
Reference: Sahih al-Bukhari 7079, Book of Afflictions and the End of the World. English translation by Dr. Muhammad Muhsin Khan.