The Book of Marriage
16/16. Chapter:
The command to accept invitations
Sahih Muslim
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 " .
Ibn Umar (Allah be pleased with him) reported that Allah's Messenger (ﷺ) said: When any one of you is invited to a feast, he should attend it.
Reference : Sahih Muslim 1429aIn-book reference : Book 16, Hadith 112USC-MSA web (English) reference : Book 8, Hadith 3337