From Cambridge Book of Magic, Francis Young edition:
For the love of a lord
Write these letters with the blood of a white dove and place them on an altar for eight days: 'Sator: Arepo: Tenet: Opera: Rotas' and dip them in holy water before you place them on the altar; and carry them in your hand and whatever you ask shall be so.
Write these names in this way on an instrument of conjuration made of lead, for you can read these names beginning in what part of the instrument of conjuration you like.s a t o r a r e p o t e n e t o p e r a r o t a s
The grimoire The Cambridge Book of Magic lists this spell.
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