I entered with the Messenger of Allah ﷺ and he found some milk in a bowl. He said, "Abu Hurayrah, go to the people of the Suffah and call them to me."So I went to them and called them. They came forward, asked permission to enter, and he granted it. They entered and drank.
دخلت مع رسول الله ﷺ فوجد لبنا في قدح، فقال: يا أبا هريرة، الحق أهل الصفة، فادعهم إلي قال: فأتيتهم فدعوتهم، فأقبلوا، فاستأذنوا، فأذن لهم فدخلوا أي فشربوا.
Bukhari related it in the Book of Seeking Permission (6246) from Abu Naeem, who said, Umar bin Dharr narrated to us. He also narrated it from Muhammad bin Muqatil, who said, Abdullah informed us, Umar bin Dharr informed us, Mujahid informed us, from Abu Hurairah, who said, and then he mentioned it.Then Bukhari related it in the Book of Raqaiq (6452) from Abu Naeem, with about half of this hadith. Umar bin Dharr narrated to us, Mujahid narrated to us, that Abu Hurairah used to say, "By Allah, besides whom there is no other god, there were times when I would press my liver against the ground from hunger, and there were times when I would tie a stone against my stomach from hunger. One day I sat on the path they used to come out from, and Abu Bakr passed by, so I asked him about a verse from the Book of Allah, asking only so that he might feed me, but he passed on and did not do so. Then Umar passed by me, so I asked him about a verse from the Book of Allah, asking only so that he might feed me, but he passed on and did not do so. Then Abu Qasim ﷺ passed by me, and he smiled when he saw me, for he knew what was in my heart and what was on my face. He said, 'O Abu Hurr.' I said, 'At your service, Messenger of Allah.' He said, 'Come along.' He went on and I followed him. He entered and asked permission, and permission was given to me, and I entered. He found milk in a bowl, and he said, 'Where did this milk come from?' They said, 'So-and-so, man or woman, gave it to you as a gift.' He said, 'Abu Hurr.' I said, 'At your service, Messenger of Allah.' He said, 'Go to the people of Suffah and call them to me.'"He said, "The people of Suffah were the guests of Islam. They had no family or wealth or anyone to lean on. Whenever charity came to him, he would send it to them and would not take anything from it himself, but whenever a gift came to him, he would send some to them while keeping some for himself and sharing it with them. This troubled me, and I said to myself, 'What good is this milk among the people of Suffah? I was more deserving than they of having a drink of this milk to strengthen myself. When they come, he will order me to serve them, and what is likely to be left for me from this milk?' But there was no escaping obedience to Allah and obedience to His Messenger ﷺ, so I went to them and called them, and they came. They asked permission and were given it, and they took their places in the house.He said, 'O Abu Hurr.' I said, 'At your service, Messenger of Allah.' He said, 'Take this and give it to them.' So I took the bowl and began giving it to each man, and he would drink until he was satisfied, then return the bowl to me, and I would give it to the next man, and he would drink until he was satisfied, then return the bowl to me, and so on, until I reached the Prophet ﷺ, by which time everyone had drunk their fill. He took the bowl and placed it on his hand, then looked at me and smiled, and said, 'Abu Hurr.' I said, 'At your service, Messenger of Allah.' He said, 'Only you and I are left.' I said, 'You have spoken the truth, Messenger of Allah.' He said, 'Sit down and drink.' So I sat down and drank. He said, 'Drink,' so I drank, and he kept saying, 'Drink,' until I said, 'No, by Him who sent you with the truth, I can find no more room for it.' He said, 'Then give it to me.' So I gave him the bowl, and he praised Allah, said the name of Allah, and drank what remained."It seems that what Bukhari intended by "about half of this hadith" was the portion found in the Book of Seeking Permission, while the rest of the hadith came to him by way of wijadah (finding it in writing) or ijazah (authorization), or from a teacher other than Abu Naeem, or by some other means.Bayhaqi related it (2/446) through the route of Ali bin Abdul-Aziz, from Abu Naeem, connected in full.