Sahih Bukhari Volume 007, Book 067, Hadith Number 445.
Narrated By Khalid bin Al-Walid : Allah's Apostle and I entered the house of Maimuna. A roasted mastigure was served. Allah's Apostle stretched his hand out (to eat of it) but some woman said, "Inform Allah's Apostle of what he is about to eat." So they said, "It is mastigure, O Allah's Apostle!" He withdrew his hand, whereupon I said, "O Allah's Apostle! Is it unlawful?" He said, "No, but this is not found in the land of my people, so I dislike it." So I pulled the mastigure towards me and ate it while Allah's Apostle was looking at me.