Sahih Muslim
The Book on Government (Kitab Al-Imara)
Book Number: 020 / Hadith Number: 4475
It has been narrated on the authority of Jabir b. 'Abdullah that the Messenger of Allah (may peace be upon him) said: 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).