Beautiful story, Darrel!
As for a carthatic prayer... being protestant, Sky and I, it would come from one's own heart. At this point, I'm not sure if you're asking about a previously written one as in the Hail Mary, etc. that are found in the Catholic denomination. Is that what you are asking about?
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Psalm 119:105 Thy word is a lamp unto my feet, and a light unto my path.