There isn’t anyone I want to invite," mumbled Harry, who was still not trying to think about Ginny any more than he could help, despite the fact the fact that she kept cropping up in his dreams in ways that made him devoutly thankful that Ron could not perform Legilimency.
There are no more uses of "devout" in the book.
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How can they devoutly believe everything they hear in church and then say the things they do and listen to the things they hear without throwing up?
Harper Lee -- Go Set a Watchman
Yetta knew it wouldn’t be long before devout Jews—her father, Rahel’s husband—would begin the havdalah prayers, dividing the sacredness of the Sabbath from ordinary, everyday life.