Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) said: "The wedding feast (walimah) on the first day is a right, on the second day a favour (an extra good deed), and on the third day it is showing off and seeking fame; and whoever shows off, Allah disgraces him."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 8935