Sahih al-Bukhari 5179
صحيح البخاري#5179Sahihحَدَّثَنَا عَلِيُّ بْنُ عَبْدِ اللَّهِ بْنِ إِبْرَاهِيمَ، حَدَّثَنَا الْحَجَّاجُ بْنُ مُحَمَّدٍ، قَالَ قَالَ ابْنُ جُرَيْجٍ أَخْبَرَنِي مُوسَى بْنُ عُقْبَةَ، عَنْ نَافِعٍ، قَالَ سَمِعْتُ عَبْدَ اللَّهِ بْنَ عُمَرَ ـ رضى الله عنهما ـ يَقُولُ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " أَجِيبُوا هَذِهِ الدَّعْوَةَ إِذَا دُعِيتُمْ لَهَا ". قَالَ كَانَ عَبْدُ اللَّهِ يَأْتِي الدَّعْوَةَ فِي الْعُرْسِ وَغَيْرِ الْعُرْسِ وَهْوَ صَائِمٌ.
Narrated Nafi`:`Abdullah bin `Umar said, "Allah's Messenger (ﷺ) said, 'Accept the marriage invitation if you are invited to it.' " Ibn `Umar used to accept the invitation whether to a wedding banquet or to any other party, even when he was fasting
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:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 67:114