From Egyptian Secrets of Albertus Magnus, Joseph H. Peterson edition:
To Understand the Song of Birds.
Take the tongue of a vulture, lay it for three days and three nights in honey, afterward under your tongue, and thus you will understand all the songs of birds.
Timeline of related events
1725Publication of Egyptian Secrets of Albertus Magnus (lists this spell)
1869English-language translation of Egyptian Secrets (lists this spell)