Sunan Ibn Majah, Chapter: The Chapters on Food

that when his food, or whatever was in front of him was cleared away, the Prophet (saw) used to say: "Al-hamdu lillahi hamdan kathiran tayyiban mubarakan ghaira makfiyyin wa la muwadda'in wa la mustaghnan 'anhu, Rabbana (Praise is to Allah, abundant good and blessed praise, a never-ending praise, a praise that we will never bid farewell to and an indispensible praise, He is our Lord)."