It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him); he said: Abu Talhah (may Allah be pleased with him) instructed Umm Sulaym (may Allah be pleased with her) and said: "Make food especially for the Messenger of Allah (peace and blessings be upon him), for him (peace and blessings be upon him) alone, which he can eat himself." Then Abu Talhah sent me to the Prophet (peace and blessings be upon him). I came to him (peace and blessings be upon him) and said: "Abu Talhah has sent me to you." He (peace and blessings be upon him) said to the people: "Get up." Abu Talhah met us and said: "O Prophet of Allah! I only prepared this food especially for you." He (peace and blessings be upon him) said: "There is no harm; take us along." So all the people set off with him, and he brought the food that had been made for the Prophet (peace and blessings be upon him) alone. The Messenger of Allah (peace and blessings be upon him) placed his hand and said Bismillah, then said: "Let ten come in." They were let in and they came in; he (peace and blessings be upon him) said: "Eat, saying Bismillah." So they ate until they were full, then got up, and the Prophet (peace and blessings be upon him) placed his hand just as he had done the first time and said Bismillah, then said: "Let ten come in." The narrator said: Until he did that with eighty men. Then the Prophet (peace and blessings be upon him) and the household ate and left some food over.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21743