Sahih al-Bukhari 3495, 3496
Narrated Abu Huraira:
The Prophet (ﷺ) said, "The tribe of Quraish has precedence over the people in this connection (i.e the right 
of ruling). The Muslims follow the Muslims amongst them, and the infidels follow the infidels 
amongst them. People are of different natures: The best amongst them in the pre-lslamic period are the 
best in Islam provided they comprehend the religious knowledge. You will find that the best amongst 
the people in this respect (i.e. of ruling) is he who hates it (i.e. the idea of ruling) most, till he is given 
the pledge of allegiance."
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا الْمُغِيرَةُ، عَنْ أَبِي الزِّنَادِ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ ‏"‏ النَّاسُ تَبَعٌ لِقُرَيْشٍ فِي هَذَا الشَّأْنِ، مُسْلِمُهُمْ تَبَعٌ لِمُسْلِمِهِمْ، وَكَافِرُهُمْ تَبَعٌ لِكَافِرِهِمْ ‏"‏‏.‏   
"وَالنَّاسُ مَعَادِنُ، خِيَارُهُمْ فِي الْجَاهِلِيَّةِ خِيَارُهُمْ فِي الإِسْلاَمِ إِذَا فَقِهُوا، تَجِدُونَ مِنْ خَيْرِ النَّاسِ أَشَدَّ النَّاسِ كَرَاهِيَةً لِهَذَا الشَّأْنِ حَتَّى يَقَعَ فِيهِ."