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 1977 b

Ibn Buraida, on the authority of his father, reported Allah's Messenger (ﷺ) having said this:

I used to forbid you. The rest of the hadith is the same.
وَحَدَّثَنِي حَجَّاجُ بْنُ الشَّاعِرِ، حَدَّثَنَا الضَّحَّاكُ بْنُ مَخْلَدٍ، عَنْ سُفْيَانَ، عَنْ عَلْقَمَةَ، بْنِ مَرْثَدٍ عَنِ ابْنِ بُرَيْدَةَ، عَنْ أَبِيهِ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏ "‏ كُنْتُ نَهَيْتُكُمْ ‏"‏ ‏.‏ فَذَكَرَ بِمَعْنَى حَدِيثِ أَبِي سِنَانٍ ‏.‏
Reference : Sahih Muslim 1977b
In-book reference : Book 35, Hadith 51
USC-MSA web (English) reference : Book 22, Hadith 4867
  (deprecated numbering scheme)