Sahih Bukhari | Volume 7 | Hadith Number 407

Narrated by 'Abdullah
Allah's Apostle said that he met Zaid bin 'Amr Nufail at a place near Baldah and this had happened before Allah's Apostle received the Divine Inspiration. Allah's Apostle presented a dish of meat (that had been offered to him by the pagans) to Zaid bin 'Amr, but Zaid refused to eat of it and then said (to the pagans), "I do not eat of what you slaughter on your stone-altars (Ansabs) nor do I eat except that on which Allah's Name has been mentioned on slaughtering."