In Operibus Sigillo Dei Aemeth, Part 0, “The Seal of God’s Truth” by David Richard Jones

“Dee was himself told originally to adapt the form from several in his own collection of Grimoires; but which one, was not made clear either by Dee or the Angels. A number of variations on the Seal of God or Seal of God’s Truth are to be found in MSS owned by Dee.” [via]