Narrated 'Ali:
"I asked the Messenger of Allah (ﷺ) about the day of Al-Hajj Al-Akbar, and he said: "The day of An-Nahr." (RU)
English reference (RU): Vol. 5, Book 44, Hadith 3088 (RU)
Arabic reference (RU): Book 47, Hadith 3368 (RU)