Pow-Wows, or Long Lost Friend, by John George Hoffman, [1820], at sacred-texts.com
A GOOD REMEDY AGAINST CALUMNIATION OR SLANDER.
If you are calumniated or slandered to your very skin, to your very flesh, to your very bones, cast it back upon the false tongues. + + +
Take off your shirt, and turn it wrong side out, and then run your two thumbs along your body, close under the ribs, starting at the pit of the heart down to the thighs.