Abu Umamah (May Allah be pleased with him) reported:
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]. (IT)
App reference (IT): Book 3, Hadith 7 (IT)
Arabic/English book reference (IT): Book 3, Hadith 734 (IT)