I've also read (somewhere) about the post meal prayer in the Jewish tradition. I believe that it can be traced to this verse.

Deut. 8:10

When you have eaten and are full, then you shall bless the Lord your God for the good land which He has given you.

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Christopher
"Let us hear the conclusion of the whole matter: Fear God, and keep his commandments: for this is the whole duty of man."
Ecclesiastes (12:13)
Church Affiliation: Faith Presbyterian OPC