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).
Sahih Muslim Book 33, Hadith 3
← Previous Hadith This is one of the traditions narrated by Abu Huraira from the Messenger of Allah (ﷺ) who said: People are subservient to the Quraish: the Muslims among them being subservient to the Muslims among them, and the disbelievers among them being subservient to the disbelievers among them.

Sahih Muslim Book 33, Hadith 2 Next Hadith → The Caliphate will remain among the Quraish even if only two persons are left (on the earth),

Sahih Muslim Book 33, Hadith 4