It is narrated from Umm al-Mu'minin Sayyida Aisha Siddiqa (may Allah be pleased with her), she says that the Noble Prophet (peace and blessings be upon him) was eating food with his six companions (may Allah be pleased with them all) when a Bedouin (villager) came and ate (the food that was present) in two bites. So the Messenger of Allah (peace and blessings be upon him) said: "If this Bedouin had recited 'Bismillah' at the beginning, this food would have sufficed for all of you."
Hadith Referenceشمائل ترمذي / باب ما جاء فى قول رسول الله صلى الله عليه وسلم قبل الطعام وبعدما يفرغ منه / 192
Hadith Gradingزبیر علی زئی:سنده صحيح
Hadith Takhrij{ «سنده صحيح» } : «(سنن ترمذي : 1858 اب، وقال : حسن صحيح) ، ديكهئے : حديث سابق:188»