Messenger of Allah ﷺ said, "The food for two persons is sufficient for three, and the food of three persons is sufficient for four persons." (Using translation from Bukhārī 5392)
أَنَّ رَسُولَ اللهِ ﷺ قَالَ «طَعَامُ الِاثْنَيْنِ كَافِي الثَّلَاثَةِ وَطَعَامُ الثَّلَاثَةِ كَافِي الْأَرْبَعَةِ»