From Egyptian Secrets of Albertus Magnus, Joseph H. Peterson edition:
For the Jaundice of Horses.
On the night of St. Martin's Day, and on the morning of the same day, give to the horse early red barley to eat, and during the same year the horse will not suffer from yellow jaundice.
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)