From Egyptian Secrets of Albertus Magnus, Joseph H. Peterson edition:
An Amulet against Cramp.
Take white root of rhubarb, pulverize the same, and fill with such powder a square pouch made of linen, about three thumbs in size. The patient should carry the pouch on a string around his neck that it will touch the bare skin in the neighborhood of the stomach.
The grimoire Egyptian Secrets of Albertus Magnus lists this spell.
Timeline of related events
1725Publication of Egyptian Secrets of Albertus Magnus (lists this spell)
1869English-language translation of Egyptian Secrets (lists this spell)