صَحِيحُ مُسْلِمٍ
Sahih Muslim 1429 a
The Book of Marriage
The command to accept invitations
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.
Sahih Muslim, 1429 aSahihصحيح