Where do you find a hymn entitled Peace Peace Wonderful Peace?

If you mean in what book can you find it ,then many of the Ira Sankey songbooks will have it and probably many other Baptist type hymnbooks as well.

If you are looking for a recording of it , you probably may find it at a similar source.I know of one by the Sacred Music Services which have at least part of it on a medley .

The song is a pentecostal medley, allegedly written by Cynthia Pickens of FellowshipWorld, Buffalo, NY. The lyrics are simple and repetitive: Peace Peace Peace, Wonderful Peace (x2) Peace in the morning, Peace at Night Peace Peace Peace, Wonderful Peace (x2) Contact FellowshipWorld for a copy, it is sung there quite often.