حَدَّثَنَا الْقَعْنَبِيُّ، عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏"‏ إِذَا دُعِيَ أَحَدُكُمْ إِلَى الْوَلِيمَةِ فَلْيَأْتِهَا ‏"‏ ‏.‏

Jabir reported the Messenger of Allah(ﷺ) as sayings

when one of you is invited to a meal, he must accept. If he wishes he may eat, but if he wishes(to leave), he may leave.