Narrated Abu Huraira: Allah's Apostle said, "The food for two persons is sufficient for three, and the food of three persons is sufficient for four persons."
Hadith ReferenceSahih Bukhari / The Book of Foods (Meals) / Hadith: 5392
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة