كتاب الأضاحى
35  
The Book of Sacrifices
(5)
Chapter: The prohibition of eating sacrificial meat for more than three days, which applied at the beginning of Islam but was then abrogated, and now it is permissible to eat it as long as one wants.
(5)
باب بَيَانِ مَا كَانَ مِنَ النَّهْىِ عَنْ أَكْلِ لُحُومِ الأَضَاحِيِّ بَعْدَ ثَلاَثٍ فِي أَوَّلِ الإِسْلاَمِ وَبَيَانِ نَسْخِهِ وَإِبَاحَتِهِ إِلَى مَتَى شَاءَ
Sahih Muslim 1972 a

Jabir reported that Allah's Apostle (ﷺ) forbade eating of the flesh of sacrificed animals beyond three (days). but afterwards said:

Eat, make a provision, and keep it.
حَدَّثَنَا يَحْيَى بْنُ يَحْيَى، قَالَ قَرَأْتُ عَلَى مَالِكٍ عَنْ أَبِي الزُّبَيْرِ، عَنْ جَابِرٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم أَنَّهُ نَهَى عَنْ أَكْلِ لُحُومِ الضَّحَايَا بَعْدَ ثَلاَثٍ ثُمَّ قَالَ بَعْدُ ‏ "‏ كُلُوا وَتَزَوَّدُوا وَادَّخِرُوا ‏"‏ ‏.‏
Reference : Sahih Muslim 1972a
In-book reference : Book 35, Hadith 41
USC-MSA web (English) reference : Book 22, Hadith 4857
  (deprecated numbering scheme)