(16) باب الأَمْرِ بِإِجَابَةِ الدَّاعِي إِلَى دَعْوَةٍ
Nafil reported:
I heard Abdullah b. Umar (Allah be pleased with them) narrating that Allah's Messenger (ﷺ) said: Accept the feast when you are invited to it. And Abdullah (b. Umar) used to come to the feast, whether it was a wedding feast or other than that, and he would come there even in the state of fasting.
Reference: Sahih Muslim 1429 h
In-book reference: Book 16, Hadith 119
USC-MSA web (English) reference(deprecated numbering scheme): Book 8, Hadith 3344