Sayyiduna Utbah bin Amr al-Sulami (may Allah be pleased with him) said: The Messenger of Allah (peace and blessings be upon him) said: "The caliphate is in Quraysh, judgement (decision-making) is in the Ansar, the call (to Islam) is in Abyssinia, and jihad and hijrah, after that, are among the Muslims and the Muhajirun."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14370