From The Long Lost Friend:
Pray early in the morning, and then turn your shirt around the left sleeve, and say: Turn, thou, shirt, and thou, fever, do likewise turn. (Do not forget to mention the name of the person having the fever.) This, I tell thee, for thy repentance sake, in the name of God the Father, the Son, and the Holy Ghost. Amen. If you repeat this for three successive mornings the fever will disappear.
Timeline of related events
1820Publication of Hohmann's Long Lost Friend (lists this spell)