The Messenger of Allah ﷺ said, "The Qurayshi has twice the strength of a man from outside Quraysh."Zuhri was asked, "What did he mean by that?"He replied, "Soundness of judgment."
قال رسول الله ﷺ: إن للقرشي مثلي قوة الرجل من غير قريش. فقيل للزهري ما عنى بذلك؟ قال: نبل الرأي.
Ahmad (16742), Abu Yaala (7400), and Tabarani (2/115) narrated it, and Ibn Hibban (6265) and Hakim (4/72) both graded it sahih. All of them narrated it through Ibn Abu Dhib, from Zuhri, from Talha bin Abdullah bin Awf, from Abdul-Rahman bin Azhar, from Jubayr bin Mutim, who related the hadith. Its chain is sahih. Hakim said, "It meets the criteria of both of them (Bukhari and Muslim)." However, Muslim did not narrate from Talha bin Abdullah.