Mishkat al-Masabih 1 Faith كتاب الإيمان 166

وَعَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «اتَّبِعُوا السَّوَادَ الْأَعْظَمَ فَإِنَّهُ مَنْ شَذَّ شَذَّ فِي النَّارِ» . رَوَاهُ ابْنُ مَاجَهْ من حَدِيث أنس

He also reported God’s messenger as saying, “Follow the main body, for he who is separate from it will be separate in hell.” 1 1 The source is lacking. The editor of Damascus edition quotes Mirak Shah as saying Ibn Majah gives this tradition from Anas. Ibn Majah (fitran, 8) has part of this in a tradition from Anas.