Narrated 'Amir bin Sa'd bin Abi Waqqas:
from his father, saying "Mu'awiyah bin Abu Sufyan ordered Sa'd, saying 'What prevented you from reviling Abu Turab?' He said: 'Three things that I remember from the Messenger of Allah (ﷺ) prevent me from reviling him. That I should have even one those things is more beloved to me than red camels. I heard the Messenger of Allah (ﷺ) speaking to 'Ali, and he had left him behind in one of his battles. So 'Ali said to him: "O Messenger of Allah! You leave me behind with women and children?" So the Messenger of Allah (ﷺ) said to him: "Are you not pleased that you should be in the position with me that Harun was with Musa? Except that there is no Prophethood after me?" And on the Day of (the battle of) Khaibar, I heard him saying: "I shall give the banner to a man who loves Allah and His Messenger, and Allah and His Messenger love him." So we all waited for that, then he said: "Call 'Ali for me." He said: 'So he came to him, and he had been suffering from Ramad (an eye condition), so he (ﷺ) put spittle in his eye and gave the banner to him, then Allah granted him victory. And when this Ayah was revealed: 'Let us call our sons and your sons, our women and your women...' (3:61) the Messenger of Allah (ﷺ) called 'Ali, Fatimah, Hasan, and Husain and said: "O Allah, these are my family."
English reference: Vol. 1, Book 46, Hadith 3724
Arabic reference: Book 49, Hadith 4090