وَمِنْ مُسْنَدِ عَلِيِّ بْنِ أَبِي طَالِبٍ رَضِيَ اللَّهُ عَنْهُ
5  
Musnad 'Ali Ibn Abi Talib
Musnad Ahmad 566
It was narrated that ‘Ali (رضي الله عنه) said:
The Messenger of Allah (ﷺ) said: `If I were to appoint anyone to a position of authority without consulting the believers, I would have appointed Ibn Umm `Abd (Abdullah bin Mas`ood).`
حَدَّثَنَا أَبُو سَعِيدٍ، حَدَّثَنَا إِسْرَائِيلُ، حَدَّثَنَا أَبُو إِسْحَاقَ، عَنِ الْحَارِثِ، عَنْ عَلِيٍّ، قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ لَوْ كُنْتُ مُؤَمِّرًا أَحَدًا دُونَ مَشُورَةِ الْمُؤْمِنِينَ لَأَمَّرْتُ ابْنَ أُمِّ عَبْدٍ‏.‏
Grade: Da'if (Darussalam) because of the weakness of Al-Harith Al-A'war] (Darussalam)
Reference : Musnad Ahmad 566
In-book reference : Book 5, Hadith 5