ENOfficial
'Umar b. al-Khattab reported God's messenger as saying, "Eat together and not separately, for the blessing is associated with the company." Ibn Majah transmitted it.
Source: sunnah.com
Other translations
Arabic
وَعَنْ عُمَرَ بْنِ الْخَطَّابِ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «كُلُوا جَمِيعًا وَلَا تَفَرَّقُوا فَإِنَّ الْبَرَكَةَ معَ الجماعةِ» . رَوَاهُ ابْنُ مَاجَهْ
sunnah.com