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.
حَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، أَخْبَرَنَا زَكَرِيَّاءُ بْنُ عَدِيٍّ، عَنْ عُبَيْدِ اللَّهِ بْنِ عَمْرٍو، عَنْ زَيْدِ بْنِ أَبِي أُنَيْسَةَ، عَنْ عَطَاءِ بْنِ أَبِي رَبَاحٍ، عَنْ جَابِرِ بْنِ عَبْدِ اللَّهِ، قَالَ كُنَّا لاَ نُمْسِكُ لُحُومَ الأَضَاحِيِّ فَوْقَ ثَلاَثٍ فَأَمَرَنَا رَسُولُ اللَّهِ صلى الله عليه وسلم أَنْ نَتَزَوَّدَ مِنْهَا وَنَأْكُلَ مِنْهَا . يَعْنِي فَوْقَ ثَلاَثٍ .
Jabir b. 'Abdullah reported: We did not eat the flesh of sacrificed animals beyond three (days), but then Allah's Messenger (ﷺ) commanded us to make it a provision for journey and cat it (beyond three days).