(72) باب مَنْ تَرَكَ الدَّعْوَةَ فَقَدْ عَصَى اللَّهَ وَرَسُولَهُ
Narrated Abu Huraira:
The worst food is that of a wedding banquet to which only the rich are invited while the poor are not invited. And he who refuses an invitation (to a banquet) disobeys Allah and His Apostle .
Reference: Sahih al-Bukhari 5177
In-book reference: Book 67, Hadith 112
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 7, Book 62, Hadith 106