Hadith No: 7
Al-Nasa'i - al-Sunan al-Kubra - Book of Special Qualities
Mentioning the Prophet's (peace be upon him and his holy progeny) statement about Ali: "Indeed, Allah, Glorified be His Majesty, will never humiliate him."
Volume: (7) - Page Number: (417)
[The text is lengthy, so only the relevant excerpt is provided here]
8355 - Muhammad ibn al-Muthanna narrated to us, saying: Yahya ibn Hammad narrated to us, saying: al-Wadih, also known as Abu 'Awaneq, narrated to us, saying: Yahya narrated to us
and Amr ibn Maymun said: .... And he was the first to embrace Islam among people after Khadijah, and he wore the robe of the Messenger of Allah (peace be upon him and his holy progeny) ....