It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Food on the first day is a right, food on the second day is a sunnah, and food on the third day is for show; and whoever shows off, Allah will expose him (for his showing off)."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 10294