Sahih Muslim 3512
صحيح مسلم#3512Sahihحَدَّثَنِي أَبُو الرَّبِيعِ، وَأَبُو كَامِلٍ قَالاَ حَدَّثَنَا حَمَّادٌ، حَدَّثَنَا أَيُّوبُ، ح وَحَدَّثَنَا قُتَيْبَةُ، حَدَّثَنَا حَمَّادٌ، عَنْ أَيُّوبَ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " ائْتُوا الدَّعْوَةَ إِذَا دُعِيتُمْ " .
Ibn Umar (Allah be pleased with them) reported Allah's Messenger (may be upon him) having said this:Accept the feast, when you are invited
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 Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 16:115