Hadith 754
Abu Hurairah (May Allah be pleased with him) reported:
عن أبى هريرة رضى الله عنه قال : قال رسول الله صلى الله عليه وسلم :طعام الاثنين كافي الثلاثة، وطعام الثلاثة كافي الأربعة". ((متفق عليه))
The Messenger of Allah (ﷺ) said, "The food of two persons suffices for three persons, and the food of three persons suffices for four persons." [Al-Bukhari and Muslim].
In plain words
Food meant for two can satisfy three, and food for three can stretch to four. Sharing does not shrink a blessing; it widens it.
Reference : Riyad as-Salihin 754 In-book reference : Book 2, Hadith 28