'Thanks' in the Bible

If, so far as I am concerned, I partake with a grateful heart, why am I to be found fault with in regard to a thing for which I give thanks?"

and after giving thanks He broke it and said, "This is my body which is about to be broken for you. Do this in memory of me."

Otherwise, if you bless God in spirit only, how shall he who is in the position of an ungifted man say the 'Amen' to your giving of thanks, when he does not know what your words mean?

Rightly enough you are giving thanks, and yet your neighbor is not benefited.