Sayyiduna Abu Hurayrah (may Allah be pleased with him) says that the Messenger of Allah (peace and blessings be upon him) said: "People are followers of Quraysh in this matter: their Muslims follow the Muslims of Quraysh, and their disbelievers follow the disbelievers of Quraysh."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5295
Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) says that the Messenger of Allah (peace and blessings be upon him) said: "The caliphate will remain in Quraysh as long as even two people remain."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5296
It is narrated from Ibn Abi Hathmah (may Allah be pleased with him) that he (peace and blessings be upon him) said: "Do not teach Quraysh, but learn from them; do not go ahead of Quraysh, nor lag behind them, for one man of Quraysh has the understanding of two men."
This is mursal (with the Companion missing from the chain); it has also been narrated with a connected chain, but that is not strong.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5297
It is narrated from Sayyiduna Anas (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "The rulers will be from Quraysh."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5298