The Prophet ﷺ said, "The fast is the day you all fast, the breaking of the fast is the day you all break your fast, and the sacrifice is the day you all offer sacrifice."
أخبرني محمد بن إسمعيل حدثنا إبراهيم بن المنذر حدثنا إسحق بن جعفر بن محمد حدثني عبد الله بن جعفر عن عثمان بن محمد الأخنسي عن سعيد المقبري
أن النبي ﷺ قال الصوم يوم تصومون والفطر يوم تفطرون والأضحى يوم تضحون
Its isnad is hasan. Bayhaqi (4/252) also narrated it from the hadith of Abdullah bin Jafar Zuhri, transmitted the same way. It is also found in Sharh al-Sunnah by Baghawi (6/247, 248, hadith 1726) from the hadith of Tirmidhi, transmitted the same way. The hadith has corroborating narrations in Abu Dawud (hadith 2324) and Ibn Majah (hadith 1660) and others.