In the name of Allah, at its beginning and at its end. (If you forget to say Bis — Eating & Drinking
بِسْمِ اللَّهِ أَوَّلَهُ وَآخِرَهُ
Transliteration: Bismillaahi awwalahu wa aakhirah
Translation: In the name of Allah, at its beginning and at its end. (If you forget to say Bismillah before eating)
Reference: Abu Dawud 3:347, Tirmidhi 4:288