Sahih Muslim Book 23, Hadith Number 5063.

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

Anas b. Malik reported this hadith (with a slight variation of wording) Then Allah’s Messenger (may peace be upon him) ate and the people of his house also ate. but (still) there was left a surplus, which they sent to their neighbours.