From Egyptian Secrets of Albertus Magnus, Joseph H. Peterson edition:
A Remedy hitherto Secret against Sloth and Slough, commonly called Sweeny.
Dig three burdock roots on a Friday before the sun rises, cut off every one of these roots, three round slices, sew them in a cloth, bind them over the sweeny limb or member, and let it remain there from two to four days, repeat as before until the part affected stops to ooze matter. The roots may be green or dry, it is all the same, if you only take care to dig them on a Friday before sunrise. Has been sufficiently tried on man and beast.
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)