From Egyptian Secrets of Albertus Magnus, Joseph H. Peterson edition:
Marvelous Performances of an Experienced Pigeon Fancier. To prevent Pigeons from deserting the Pigeon Coops or Dove Cots, also, that no Pigeon Hawk can catch them.
Let the pigeons be put into the cot on a Friday, pluck off two feathers from the right wing of every pigeon before they are left to fly into the coop. These feathers should be fastened by a tack in the coop, so to prevent them from falling or flying away from the coop, because as long as the feathers remain in the coop no pigeon will desert, and no hawk will catch them; but it must never be forgotten to put some stonewort or some chickweed into their drinking water.
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)