It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him); he said: One day Abu Talhah (may Allah be pleased with him) came and saw the Prophet (peace and blessings be upon him) standing and teaching the Qur'an to the people of the Suffah, and a stone was tied over his (peace and blessings be upon him) stomach to keep his stomach straight because of hunger. So he went back to Umm Sulaym (may Allah be pleased with her) and said: "I have seen in the Messenger of Allah (peace and blessings be upon him) a state that has grieved me deeply; do you have anything?" She said: "Yes, there is some barley." He said: "Prepare it." So I prepared it. Then he said to me: "Go and invite the Prophet (peace and blessings be upon him), and do not let anyone know." Anas (may Allah be pleased with him) said: When the Prophet (peace and blessings be upon him) saw me, he asked: "Has Abu Talhah sent you?" I said: "Yes." He (peace and blessings be upon him) said: "Get up." So seventy men got up with him (peace and blessings be upon him). I came to Abu Talhah and told him, and he said: "O Prophet of Allah! It is only something we prepared for you; by Allah, we do not have enough to give them anything to drink." He (peace and blessings be upon him) said: "Bring what you have." So I brought it. Umm Sulaym (may Allah be pleased with her) had a skin of ghee, and she squeezed it until she had put condiment on the food with it. Then he (peace and blessings be upon him) placed his hand, then said: "Come ten at a time." So they began eating, none of them minding another, until all of them were full, and food was left over, so much that Umm Sulaym (may Allah be pleased with her) also gave some as a gift to her neighbours.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21746