That the Messenger of Allah ﷺ said: "The food of two is sufficient for three, and the food of three is sufficient for four." He said: There are narrations on this topic from Jabir, and Ibn 'Umar.  

قَالَ رَسُولُ اللَّهِ ﷺ طَعَامُ الاِثْنَيْنِ كَافِي الثَّلاَثَةِ وَطَعَامُ الثَّلاَثَةِ كَافِي الأَرْبَعَةِ قَالَ وَفِي الْبَابِ عَنْ جَابِرٍ وَابْنِ عُمَرَ  

"The food of one is sufficient for two, and the food of two is sufficient for four, and the food of four is sufficient for eight." Another chain from Jabir that the Prophet ﷺ said similarly.  

عَنِ النَّبِيِّ ﷺ قَالَ طَعَامُ الْوَاحِدِ يَكْفِي الاِثْنَيْنِ وَطَعَامُ الاِثْنَيْنِ يَكْفِي الأَرْبَعَةَ وَطَعَامُ الأَرْبَعَةِ يَكْفِي الثَّمَانِيَةَ حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ مَهْدِيٍّ عَنْ سُفْيَانَ عَنِ الأَعْمَشِ عَنْ أَبِي سُفْيَانَ عَنْ جَابِرٍ عَنِ النَّبِيِّ ﷺ بِهَذَا