Sahih Muslim 1819
Sahih Muslim · Book 33: The Book on Government · The people follow the Quraish and the Caliphate belongs to the Quraish
It has been narrated on the authority of Jabir b. 'Abdullah that the Messenger of Allah (ﷺ) said:
وَحَدَّثَنِي يَحْيَى بْنُ حَبِيبٍ الْحَارِثِيُّ ، حَدَّثَنَا رَوْحٌ ، حَدَّثَنَا ابْنُ جُرَيْجٍ ، حَدَّثَنِي أَبُو الزُّبَيْرِ أَنَّهُ سَمِعَ جَابِرَ بْنَ عَبْدِ اللَّهِ ، يَقُولُ قَالَ النَّبِيُّ صلى الله عليه وسلم " النَّاسُ تَبَعٌ لِقُرَيْشٍ فِي الْخَيْرِ وَالشَّرِّ " .
People are the followers of Quraish in good as well as evil (i. e. in the customs of Islamic as well as pre-Islamic times).