Ibn Umar (Allah be pleased with him) reported that Messenger of Allah ﷺ said: When any one of you is invited to a feast, he should attend it.
حَدَّثَنَا يَحْيَى بْنُ يَحْيَى، قَالَ قَرَأْتُ عَلَى مَالِكٍ عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم
" إِذَا دُعِيَ أَحَدُكُمْ إِلَى الْوَلِيمَةِ فَلْيَأْتِهَا " .
• Sahih Muslim, 1429a
• Sahih Muslim, Vol. 3, Book of Marriage, Hadith 3337
• Sahih Muslim, Book of Marriage, Hadith 3337