Sahih Muslim 3518
صحيح مسلم#3518SahihJabir (Allah be pleased with him) reported that Allah's Messenger (may peace he upon him) said:When any one of you is invited to a feast, he should accept it. He may eat if he likes, or he may abandon (eating) if he likes. Ibn Mathanni did not make mention of the word" feast
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 16:121