Deuteronomy 8:10

Bless, not forgetting to give thanks after meat, as well as to beg God's blessing before: for it is sanctified by the word of God and prayer, 1 Timothy iv. 45. (Menochius) --- In all things give thanks, 1 Thessalonians v. 18. Our Saviour did so at the last supper, Matthew xxvi. 26. At taking the cup, the Jews say, "Blessed be thou, O Lord, who createdst the fruit of the vine." At the end of the repast, one of the most dignified at table, holding a cup full of wine, says, "Let us bless Him, who has fed us with his goods, and who preserves our life by his goodness;" and all answer, "Blessed be He from whom we have received food and life:" after which a long prayer is recited. (Fagius) --- In compliance with this custom, our Lord took the cup after supper, and recited (Haydock) or sung a hymn, Luke xxii. 20., and Matthew xxvi. 30. (Calmet)