When any one of you is invited to a feast, he should accept. 'Ubaidallah took this feast to be a wedding feast. (Using translation from Muslim 1429b)
عَنِ النَّبِيِّ ﷺ قَالَ إِذَا دُعِيَ أَحَدُكُمْ إِلَى الْوَلِيمَةِ فَلْيُجِبْ قَالَ خَالِدٌ فَإِذَا عُبَيْدُ اللهِ يُنْزِلُهُ عَلَى الْعُرْسِ