It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "The worst food is the food of a wedding feast (walimah) from which those who would come are kept away, and to which the one who refuses is invited. And whoever does not accept the invitation has disobeyed Allah and His Messenger (peace and blessings be upon him)."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصداق / 14524