Musnad Ahmad Hadith 18489

It is narrated from Bara’ (may Allah be pleased with him) that once (on the day of Eid al-Adha) the Noble Prophet (ﷺ) addressed us and said: Today, we will begin the day by performing the prayer, then return home and offer the sacrifice. Whoever does so has reached our way, and whoever offers the sacrifice before the Eid prayer, it is merely meat that he has given to his family beforehand; it has nothing to do with the sacrifice. My uncle, Abu Burdah bin Niyar (may Allah be pleased with him), had already slaughtered his animal before the Eid prayer. He said, “O Messenger of Allah (ﷺ)! I have already slaughtered my animal, but now I have a six-month-old kid which is better than a year-old animal.” The Noble Prophet (ﷺ) said, “Slaughter it in its place, but this permission is not for anyone except you.”