From Egyptian Secrets of Albertus Magnus, Joseph H. Peterson edition:
An Approved Remedy to prevent Horses from becoming Stiff.
Put, three Sundays in succession, before the rising of the sun, three handfuls of salt, and seventy-two juniper berries in the manger so that the horse will eat them, and wash the hind shanks with warm vinegar. Horses so treated will never become stiff nor stubborn.
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)