Sahih al-Bukhari 5173
Book 67: Wedlock, Marriage (Nikaah) · Narrated by `Abdullah bin `Umar
Arabic
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ، أَخْبَرَنَا مَالِكٌ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ ـ رضى الله عنهما ـ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " إِذَا دُعِيَ أَحَدُكُمْ إِلَى الْوَلِيمَةِ فَلْيَأْتِهَا ".
English translation
Narrated `Abdullah bin `Umar:Allah's Messenger (ﷺ) said, "If anyone of you is invited to a wedding banquet, he must go for it (accept the invitation)
Reference: Sahih al-Bukhari 5173, Book of Wedlock, Marriage (Nikaah). English translation by Dr. Muhammad Muhsin Khan.