Sahih Muslim Book - 44, Hadith - 6454

حَدَّثَنِي حَرْمَلَةُ بْنُ يَحْيَى ، أَخْبَرَنَا ابْنُ وَهْبٍ ، أَخْبَرَنِي يُونُسُ ، عَنِ ابْنِ شِهَابٍ ، حَدَّثَنِي سَعِيدُ بْنُ الْمُسَيَّبِ ، عَنْ أَبِي هُرَيْرَةَ ، أَنَّ رَسُولَ اللهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ، قَالَ: تَجِدُونَ النَّاسَ مَعَادِنَ ، فَخِيَارُهُمْ فِي الْجَاهِلِيَّةِ خِيَارُهُمْ فِي الإِسْلاَمِ إِذَا فَقِهُوا ، وَتَجِدُونَ مِنْ خَيْرِ النَّاسِ فِي هَذَا الأَمْرِ ، أَكْرَهُهُمْ لَهُ ، قَبْلَ أَنْ يَقَعَ فِيهِ ، وَتَجِدُونَ مِنْ شِرَارِ النَّاسِ ذَا الْوَجْهَيْنِ ، الَّذِي يَأْتِي هَؤُلاَءِ بِوَجْهٍ وَهَؤُلاَءِ بِوَجْهٍ.

It was narrated from Abu Hurairah that the Messenger of Allah (s.a.w) said: "You will find that people are of different qualities. The best of them in the Jahiliyyah will be the best of them in Islam, when they attain Fiqh (the true understanding of Islam). And you will find that among the best of people in positions of authority are those who dislike it most, before it is thrust upon them. And you will find that among the worst of people is the one who is two-faced, showing one face to these people and another face to those."