Reporting his father, Imam al-Sadiq (a.s) says, “During the time of the Holy Prophet, the needy had to spend nights in the mosque because they had no home. One evening, the Holy Prophet broke his fast with the needy in the mosque in a stone vessel. Since the food had been blessed by the Holy Prophet, thirty people ate from it and they took the rest of the food for their wives
source : http://www.maaref-foundation.com