Hadith
حَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ، حَدَّثَنَا أَبُو مُعَاوِيَةَ، حَدَّثَنَا مُوسَى بْنُ مُسْلِمٍ، عَنِ ابْنِ سَابِطٍ، - وَهُوَ عَبْدُ الرَّحْمَنِ - عَنْ سَعْدِ بْنِ أَبِي وَقَّاصٍ، قَالَ قَدِمَ مُعَاوِيَةُ فِي بَعْضِ حَجَّاتِهِ فَدَخَلَ عَلَيْهِ سَعْدٌ فَذَكَرُوا عَلِيًّا فَنَالَ مِنْهُ فَغَضِبَ سَعْدٌ وَقَالَ تَقُولُ هَذَا لِرَجُلٍ سَمِعْتُ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ يَقُولُ " مَنْ كُنْتُ مَوْلاَهُ فَعَلِيٌّ مَوْلاَهُ " . وَسَمِعْتُهُ يَقُولُ " أَنْتَ مِنِّي بِمَنْزِلَةِ هَارُونَ مِنْ مُوسَى إِلاَّ أَنَّهُ لاَ نَبِيَّ بَعْدِي " . وَسَمِعْتُهُ يَقُولُ " لأُعْطِيَنَّ الرَّايَةَ الْيَوْمَ رَجُلاً يُحِبُّ اللَّهَ وَرَسُولَهُ " .
It was narrated that Sa`d bin Waqqas said:"Mu`awiyah came on one of his pilgrimages and Sa`d entered upon him. They mentioned `Ali, and Mu`awiyah criticized him. Sa`d became angry and said: 'Are you saying this of a man of whom I heard the Messenger of Allah (ﷺ) say: "If I am a person's close friend, `Ali is also his close friend." And I heard him say: "You are to me like Harun was to Musa, except that there will be no Prophet after me." And I heard him say: "I will give the banner today to a man who loves Allah and His Messenger
Sahih · Al-Albani
Sunan Ibn Majah 121·Also available on sunnah.com·