The Prophet ﷺ stood among the pillars on the Day of Sacrifice during the Hajj he performed and asked, "What day is this?"They replied, "The Day of Sacrifice."He said, "This is the day of the greatest Hajj."
أن النبي ﷺ وقف يوم النحر بين الجمرات في الحجة التي حج، فقال: أي يوم هذا؟ قالوا: يوم النحر، قال: هذا يوم الحج الأكبر.
Reported by Abu Dawud (1945) and Ibn Majah (3058), and Hakim graded it sahih (2/331), as did Bayhaqi (5/139), from the hadith of Hisham bin Ghaz, who said, "I heard Nafi narrating from Ibn Umar," and he mentioned it. The wording is that of Abu Dawud. Its chain of transmission is sahih.Humayd bin Abdul-Rahman likewise said the same, as found in the Sahihayn, Bukhari (4657) and Muslim (1347).