Narrated Abu Hurairah:
that the Messenger of Allah (ﷺ) said: "Leadership is among the Quraish, and reasoning and judgment is among the Ansar, and the Adhan is among the Ethiopians, and the trust is among the Al-Azd." meaning Yemen. (AR)
English reference (AR): Vol. 1, Book 46, Hadith 3936 (AR)
Arabic reference (AR): Book 49, Hadith 4315 (AR)