Sahih Bukhari Volume 7, Book 73, Hadith 5571

حَدَّثَنَا أَبُو عَاصِمٍ، عَنْ يَزِيدَ بْنِ أَبِي عُبَيْدٍ، عَنْ سَلَمَةَ بْنِ الأَكْوَعِ، قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم ‏"‏ مَنْ ضَحَّى مِنْكُمْ فَلاَ يُصْبِحَنَّ بَعْدَ ثَالِثَةٍ وَفِي بَيْتِهِ مِنْهُ شَىْءٌ ‏"‏‏.‏ فَلَمَّا كَانَ الْعَامُ الْمُقْبِلُ قَالُوا يَا رَسُولَ اللَّهِ نَفْعَلُ كَمَا فَعَلْنَا عَامَ الْمَاضِي قَالَ ‏"‏ كُلُوا وَأَطْعِمُوا وَادَّخِرُوا فَإِنَّ ذَلِكَ الْعَامَ كَانَ بِالنَّاسِ جَهْدٌ فَأَرَدْتُ أَنْ تُعِينُوا فِيهَا ‏"‏‏

Narrated By Salama bin Al-Aqua' : The Prophet said, "Whoever has slaughtered a sacrifice should not keep anything of Its meat after three days." When it was the next year the people said, "O Allah's Apostle! Shall we do as we did last year?" He said, ' Eat of it and feed of it to others and store of it for in that year the people were having a hard time and I wanted you to help (the needy)."