Sahih al-Bukhari, Hadith 5574 ⓘ
Narrated Salim: `Abdullah bin `Umar said, "Allah's Messenger said, "Eat of the meat of sacrifices (of `Id al Adha) for three days." When `Abdullah departed from Mina, he used to eat (bread with) oil, lest he should eat of the meat of Hadi (which is regarded as unlawful after the three days of the `Id).
حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ الرَّحِيمِ، أَخْبَرَنَا يَعْقُوبُ بْنُ إِبْرَاهِيمَ بْنِ سَعْدٍ، عَنِ ابْنِ أَخِي ابْنِ شِهَابٍ، عَنْ عَمِّهِ ابْنِ شِهَابٍ، عَنْ سَالِمٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ ـ رضى الله عنهما ـ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " كُلُوا مِنَ الأَضَاحِيِّ ثَلاَثًا " . وَكَانَ عَبْدُ اللَّهِ يَأْكُلُ بِالزَّيْتِ حِينَ يَنْفِرُ مِنْ مِنًى، مِنْ أَجْلِ لُحُومِ الْهَدْىِ.
also referenced under: Book 73, Hadith 30 (In-Book) & Volume 7, Book 68, Hadith 480 (USC-MSA)