الْحَمْدُ لِلَّهِ الَّذِي أَطْعَمَنِي هَذَا، وَرَزَقَنِيهِ، مِنْ غَيْرِ حَوْلٍ مِنِّي وَلاَ قُوَّةٍ
Praise is to Allah Who has given me this food and sustained me with it though I was unable to doit and powerless.
Alhamdu lillaahil-lathee 'at'amanee haathaa, wa razaqaneehi, min ghayri hawlin minnee wa laa quwwatin.
Allah will forgive him for all previous sins
At-Tirmithi, Abu Dawud, and Ibn Majah. See also Al-Albani, Sahih At-Tirmithi 3/159.