It is narrated from Sayyiduna al-Zubayr (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Allah Almighty has favoured Quraysh with seven qualities: He favoured them in that they worshipped Allah for ten years, during which no one but a Qurashi worshipped Him. He favoured them in that He helped them in the year of the elephants (on the day of the event of the Elephant), although they were idolaters at the time. He favoured them in that an entire surah of the Qur'an was revealed about them in which no one else is included besides them, namely: 'For the accustomed security of Quraysh.' And He favoured them in that prophethood, the caliphate, the custodianship of the Ka'bah (keeping its keys) and the service of giving water to the pilgrims are among them."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Hisham bin Urwah except Abdullah bin Mus'ab, and this hadith is not narrated from Sayyiduna al-Zubayr (may Allah be pleased with him) except with this chain."
Hadith Referenceالمعجم الأوسط / باب الميم / 9173
Hadith Gradingمحدثین:فيه من ضُعِّف، ووثقهم ابن حبان
Hadith Takhrij«قال الهيثمي: فيه من ضعف ووثقهم ابن حبان «مجمع الزوائد ومنبع الفوائد، ج 10، ص 25»»