Authentic Supplication Number 209.

When the Prophet ¬†would lift his place setting he would say: ‘Al-hamdu lil-lahi katheeran, tayyiban, mubarakan feehi, ghayra makfiyyin, wa la muwadda`in, wa la mustaghnan `anhu rabbuna (225).

(225) All praise to Allah, plentiful, delightful, blessed, not desisting [from us, but remaining for us as long as we live], and not bidding farewell [because it is not, Allah willing, the last food we shall eat].

Reported by Al-Bukhari, and is #150 in The Authentic of Good Sayings.