The Book of Marriage
16/16. Chapter:
The command to accept invitations
Sahih Muslim
حَدَّثَنَا ابْنُ نُمَيْرٍ، حَدَّثَنَا عُبَيْدُ اللَّهِ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ " إِذَا دُعِيَ أَحَدُكُمْ إِلَى وَلِيمَةِ عُرْسٍ فَلْيُجِبْ " .
Ibn Umar (Allah be pleased withthem) reported Allah's Apostle (ﷺ) having said this: When any one of you is invited to a wedding feast, he should accept that.
Reference : Sahih Muslim 1429cIn-book reference : Book 16, Hadith 114USC-MSA web (English) reference : Book 8, Hadith 3339