Sahih al-Bukhari, Volume 5, Book 59, Hadith 687 (USC-MSA) ⓘ
Narrated Jarir: The Prophet ordered me during Hajjatul-Wada`. "Ask the people to listen." He then said, "Do not become infidels after me by cutting the necks (throats) of one another. "
حَدَّثَنَا حَفْصُ بْنُ عُمَرَ، حَدَّثَنَا شُعْبَةُ، عَنْ عَلِيِّ بْنِ مُدْرِكٍ، عَنْ أَبِي زُرْعَةَ بْنِ عَمْرِو بْنِ جَرِيرٍ، عَنْ جَرِيرٍ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ فِي حَجَّةِ الْوَدَاعِ لِجَرِيرٍ " اسْتَنْصِتِ النَّاسَ " فَقَالَ " لاَ تَرْجِعُوا بَعْدِي كُفَّارًا، يَضْرِبُ بَعْضُكُمْ رِقَابَ بَعْضٍ ".
also referenced under: Book 64, Hadith 427 (In-Book) & Hadith 4405 (DarusSalam)