It is narrated from Hazrat Abu Hurairah (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: The capability for leadership is in the Quraysh, the capability for judiciary is in the Ansar, the capability for calling to prayer is in the Abyssinians, and swiftness is in the people of Yemen. (The narrator of the hadith, Zaid, once also said that trustworthiness is in the people of Azd.)