Mishkat al-Masabih 30 Fine Qualities كتاب المناقب 124

عَنْ عُمَرَ رَضِيَ اللَّهُ عَنْهُ قَالَ: مَا أَحَدٌ أَحَقَّ بِهَذَا الْأَمْرِ مِنْ هَؤُلَاءِ النَّفَرِ الَّذِينَ تُوُفِّيَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَهُوَ عَنْهُمْ رَاضٍ فَسَمَّى عَلِيًّا وَعُثْمَانَ وَالزُّبَيْرَ وَطَلْحَةَ وَسَعْدًا وَعَبْدَ الرَّحْمَنِ. رَوَاهُ الْبُخَارِيُّ

Ibn `Umar said no one was more worthy of the Caliphate than those persons with whom God’s messenger was pleased at the time of his death, and he named ‘Ali, `Uthman, az-Zubair, Talha, Sa’d and `Abd ar-Rahman. Bukhari transmitted it.