Hadith 5981

Ibn `Umar reported the Prophet as saying, "This matter will continue in Quraish as long as two of them remain[*]. *Mirqat, 5:508, explains this as meaning that the Caliphate will remain the prerogative of Quraish as long as two human beings survive. (Bukhari and Muslim.)

وَعَنِ ابْنِ عُمَرَ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «لَا يَزَالُ هَذَا الْأَمْرُ فِي قُرَيْشٍ مَا بَقِيَ مِنْهُمُ اثْنَان» . مُتَّفق عَلَيْهِ