Sunan Ibn Majah, Volume 5, Book 36, Hadith 3992 (DarusSalam) ⓘ
It was narrated from ‘Awf bin Malik that the Messenger of Allah said: “The Jews split into seventy-one sects, one of which will be in Paradise and seventy in Hell. The Christians split into seventy-two sects, seventy-one of which will be in Hell and one in Paradise. I swear by the One Whose Hand is the soul of Muhammad, my nation will split into seventy-three sects, one of which will be in Paradise and seventy-two in Hell.” It was said: “O Messenger of Allah, who are they?” He said: “The main body.”
حَدَّثَنَا عَمْرُو بْنُ عُثْمَانَ بْنِ سَعِيدِ بْنِ كَثِيرِ بْنِ دِينَارٍ الْحِمْصِيُّ، حَدَّثَنَا عَبَّادُ بْنُ يُوسُفَ، حَدَّثَنَا صَفْوَانُ بْنُ عَمْرٍو، عَنْ رَاشِدِ بْنِ سَعْدٍ، عَنْ عَوْفِ بْنِ مَالِكٍ، قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " افْتَرَقَتِ الْيَهُودُ عَلَى إِحْدَى وَسَبْعِينَ فِرْقَةً فَوَاحِدَةٌ فِي الْجَنَّةِ وَسَبْعُونَ فِي النَّارِ وَافْتَرَقَتِ النَّصَارَى عَلَى ثِنْتَيْنِ وَسَبْعِينَ فِرْقَةً فَإِحْدَى وَسَبْعُونَ فِي النَّارِ وَوَاحِدَةٌ فِي الْجَنَّةِ وَالَّذِي نَفْسُ مُحَمَّدٍ بِيَدِهِ لَتَفْتَرِقَنَّ أُمَّتِي عَلَى ثَلاَثٍ وَسَبْعِينَ فِرْقَةً فَوَاحِدَةٌ فِي الْجَنَّةِ وَثِنْتَانِ وَسَبْعُونَ فِي النَّارِ " . قِيلَ يَا رَسُولَ اللَّهِ مَنْ هُمْ قَالَ " الْجَمَاعَةُ " .
also referenced under: Hadith 3992 (Reference) & Book 36, Hadith 67 (In-Book)