‘Abdallah b. ‘Umar reported God’s Messenger as saying, “When one of you is invited to a wedding-feast he must attend it.” In a version by Muslim he said, “He must accept, whether it is a wedding-feast or something of that nature.” (Bukhari and Muslim.)
Hadith Referenceمشكوة المصابيح / كتاب النكاح / 3216
Hadith Gradingالألبانی:مُتَّفَقٌ عَلَيْهِ | زبیر علی زئی:متفق عليه
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «متفق عليه، رواه البخاري (5173) و مسلم (1429/96، 1429/100)»