Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) went to a house in which there were some people of Quraysh. He (peace and blessings be upon him) took hold of the two doorposts and said: "Is there anyone in the house other than a Qurashi?" They said: "No, except a son of one of our sisters." He (peace and blessings be upon him) said: "The sister's son of a people is one of them." Then he said: "This matter (the caliphate and rule) will remain among Quraysh as long as, when mercy is asked of them, they show mercy; when they judge, they are just; and when they distribute, they distribute fairly. Whoever among them does not do so, upon him is the curse of Allah Almighty, the angels and all the people; neither any voluntary deed nor any obligatory one will be accepted from him."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Awf except Mu'adh bin Awdhillah, and this hadith is narrated from Sayyiduna Abu Sa'id (may Allah be pleased with him) only with this chain."
Hadith Referenceالمعجم الأوسط / باب الألف / 2563
Hadith Takhrij«أخرجه الطبراني فى «الصغير» برقم: 216»