It is narrated from The Prophet of Islam (PBUH) who said:

If four characteristics exist in the food and meal, that meal will be a complete one.

1. It is Halal
2. Many hands are involved in eating it
3. Start (eating it) in the name of Allah (SWT)
4. Finish it with praise of Allah (SWT) [1]

[1] Al-Khisal, Page 239, Hadith 39.

Source: en.shafaqna.com