The Sixth Pentacle of Mars
It hath so great virtue that being armed therewith, if thou art attacked by any one, thou shalt neither be injured nor wounded when thou fightest with him, and his own weapons shall turn against him.
The Key of Solomon is the best known of the Renaissance grimoires, surviving in dozens of manuscripts in Latin, French, Italian and Hebrew. Mathers made his 1889 edition from seven manuscripts in the British Museum, and it is his plates that every later reproduction of these pentacles descends from.
The Key of Solomon the King (Clavicula Salomonis), translated and edited by S. Liddell MacGregor Mathers (London: George Redway, 1889). The text and the pentacles are in the public domain.
The pentacle is traced from the plate in the De Laurence edition of 1914 (Chicago: De Laurence, Scott & Co.), which reprints Mathers' plates at a larger size, and checked line for line against the 1889 printing.
Mathers' note: Around the eight points of the radii of the Pentacle are the words “ Elohim geber, Elohim hath covered (or protected),” written in the Secret Alphabet of Malachim, or the writing of the Angels. The versicle is from Psalm xxxvil. 15:—‘ Their sword shall enter into their own heart, and their bow shall be broken.”