(1) باب مَا جَاءَ فِي إِجَابَةِ الدَّعْوَةِ
'Abd Allah b. 'Umar reported the Prophet(ﷺ) as sayings:
when one of you is invited for a wedding feast, he must attend it.
Reference: Sunan Abi Dawud 3736
In-book reference: Book 28, Hadith 1
English translation: Book 27, Hadith 3727