Sunan an-Nasa'i 4131
سنن النسائي#4131Sahihأَخْبَرَنَا مُحَمَّدُ بْنُ بَشَّارٍ، قَالَ حَدَّثَنَا مُحَمَّدٌ، وَعَبْدُ الرَّحْمَنِ، قَالاَ حَدَّثَنَا شُعْبَةُ، عَنْ عَلِيِّ بْنِ مُدْرِكٍ، قَالَ سَمِعْتُ أَبَا زُرْعَةَ بْنَ عَمْرِو بْنِ جَرِيرٍ، عَنْ جَرِيرٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم فِي حَجَّةِ الْوَدَاعِ اسْتَنْصَتَ النَّاسَ قَالَ " لاَ تَرْجِعُوا بَعْدِي كُفَّارًا يَضْرِبُ بَعْضُكُمْ رِقَابَ بَعْضٍ " .
It was narrated from Jarir that :During the Farewell Pilgrimage, the Messenger of Allah [SAW] asked the people to be quiet and listen, and said: "Do not revert to disbelievers after I am gone, striking the necks of one another (killing one another)
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 37:166