Riyad us Saliheen: Hadith 734

Whenever the Prophet (ﷺ) finished a meal, he would say: "Al-hamdu lillahi hamdan kathiran taiyyiban mubarakan fihi, ghaira makfiyyin wa la muwadda`in, wa la mustaghnan `anhu, Rabbuna. (All praise is due to Allah, praise which is Abundant, pure, and full of blessings, which is indispensable and to which one cannot be indifferent).''

[Al-Bukhari].