Sahih Muslim Book 23, Hadith Number 5064.

Chapter : Permissibility of a person’s taking anyone along with him where the host is very intimate with the guest.

Anas b. Malik reported: Abu Talha saw Allah’s Messenger (may peace be upon him) lying down upon his belly in the mosque. He came to Umm Sulaim and said: I saw Allah’s Messenger (may peace be upon him) lying down upon the belly in the mosque, and I think he is hungry. The rest of the hadith is the same (but with the addition of these words) that Allah’s messenger (may peace be upon him) ate (the food) and so did Abu Talha, Umm Sulaim and Anas b. Malik, but there was left something which we presented to our neighbours.