Abu Hurairah (May Allah be pleased with him) reported:
Messenger of Allah (ﷺ) said, "The food for two suffices for three; and the food for three suffices for four persons."[Al-Bukhari and Muslim].In Muslim, Jabir (May Allah be pleased with him) reported: The Prophet (ﷺ) said, "The food for one person suffices for two; the food for two suffices for four, and the food fof four suffices for eight persons."
Arabic/English book reference: Book 1, Hadith 565