From Egyptian Secrets of Albertus Magnus, Joseph H. Peterson edition:
An Excellent Hardening.
Take radish wort, as large as you can obtain them, bruise them, and harden in the sap.
Or, take old urine, put the same in a new earthen pot, and let it be boiled down three times to one-half of the original quantity. In this fluid harden most metals.
Also, take acre-worms, called larves, as many as you choose to take, and scurvy-grass in like quantity, boil well together, distil in an alembic just the same as rosewater is distilled. In this substance you can harden whatever you desire.
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)