A woman says: "Watbah" (a particular dish made of dates, ghee and cheese) was brought to the Prophet (peace and blessings be upon him). A Bedouin took it in three morsels, so the Prophet (peace and blessings be upon him) said: "Had he said 'Bismillah', this food would have been ample for you (or would have sufficed you)." The Prophet (peace and blessings be upon him) said: "When one of you forgets to mention the name of Allah over his food, then when he remembers, he should say: 'Bismillahi awwalahu wa akhirahu' (In the name of Allah, at its beginning and at its end)."
Abu Ya'la recorded it, and its narrators are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الأطعمة / 7902