´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."
Hadith Referenceسنن ابن ماجه / باب فى فضائل اصحاب رسول الله صلى الله عليه وسلم / 121
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:ضعيف, إسناده ضعيف, عبد الرحمٰن بن سابط لم يسمع من سعد رضي اللّٰه عنه (انظر تحفة التحصيل ص 197), و حديث البخاري (3706،4416) و مسلم (2404) يغني عنه, انوار الصحيفه، صفحه نمبر 379