Hadith 10:142
Ibn Mas'ud reported God’s Messenger as saying, “The food on the first day is a duty, that on the second is a sunna , but that on the third day is to make men hear of it; and if anyone makes men hear of what he does God will make him heard of” (i.e. will publish his hypocrisy on the day of resurrection). Tirmidhi transmitted it.
قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «طَعَامُ أَوَّلِ يَوْمٍ حق وَطَعَام يَوْم الثَّانِي سنة وَطَعَام يَوْم الثَّالِثِ سُمْعَةٌ وَمَنْ سَمَّعَ سَمَّعَ اللَّهُ بِهِ» . رَوَاهُ التِّرْمِذِيّ
Original Reference: Mishkat al-Masabih 3224