Allaahs Messenger صلی اللہ علیہ وسلم said to him:

its narrated some of the Companions of Allaahs Messenger صلی اللہ علیہ وسلم said to him

O Messenger of Allaah! We eat, but do not become satisfied.

So he صلی اللہ علیہ وسلم said to them “Perhaps you eat separately?”

So they replied "Yes"

So he صلی اللہ علیہ وسلم said “Eat your food collectively, mention the Name of Allaah upon it, then there will be blessings for you in it.”

Shaykh Ibn ‘Uthaymeen mentions that this hadeeth indicates that one should eat collectively from a single plate. So if there are multiple people, they should eat collectively from a single dish, depending upon the situation. Indeed, doing so is a cause for barakah (blessings) to descend, whilst eating separately is a cause for barakah to depart.”

Sources: Sunan Abu Dawud & Sharh Riyad us Saliheen