From Egyptian Secrets of Albertus Magnus, Joseph H. Peterson edition:
An especially approved Powder for the Gravel.
Burn the blood of a hare and the entire skin in a new earthen pot to ashes, and give it to the patient dissolved in warm water. Let him take a spoonful before breakfast. It is astonishing what a powerful effect this powder exercises.
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)