Sahih Muslim 1849aBook 33, Hadith 87
حَدَّثَنَا حَسَنُ بْنُ الرَّبِيعِ، حَدَّثَنَا حَمَّادُ بْنُ زَيْدٍ، عَنِ الْجَعْدِ أَبِي عُثْمَانَ، عَنْ أَبِي، رَجَاءٍ عَنِ ابْنِ عَبَّاسٍ، يَرْوِيهِ قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " مَنْ رَأَى مِنْ أَمِيرِهِ شَيْئًا يَكْرَهُهُ فَلْيَصْبِرْ فَإِنَّهُ مَنْ فَارَقَ الْجَمَاعَةَ شِبْرًا فَمَاتَ فَمِيتَةٌ جَاهِلِيَّةٌ " .
One who found in his Amir something which he disliked should hold his patience, for one who separated from the main body of the Muslims even to the extent of a handspan and then he died would die the death of one belonging to the days of Jahiliyya.