Sunan an-Nasa'i 4425
سنن النسائي#4425Sahihأَخْبَرَنَا أَبُو دَاوُدَ، قَالَ حَدَّثَنَا يَعْقُوبُ، قَالَ حَدَّثَنَا أَبِي، عَنْ صَالِحٍ، عَنِ ابْنِ شِهَابٍ، أَنَّ أَبَا عُبَيْدٍ، أَخْبَرَهُ أَنَّ عَلِيَّ بْنَ أَبِي طَالِبٍ قَالَ إِنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَدْ نَهَاكُمْ أَنْ تَأْكُلُوا لُحُومَ نُسُكِكُمْ فَوْقَ ثَلاَثٍ .
Ali bin Abi Talib Said:"The Messenger of Allah has forbidden you from eating the meat of your sacrificaial animals for more than three day." (Sahih)
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiHasan
In-book reference: 43:65