The Fourth Pentacle of Mercury
This is further proper to acquire the understanding and Knowledge of all things created, and to seek out and penetrate into hidden things; and to command those Spirits which are called Allatori to perform embassies. They obey very readily.
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: In the centre is the Name of God, El. The Hebrew letters inscribed about the dodecagram make the sentence, “IHVH, fix Thou the Volatile, and let there be unto the void restriction.” The versicle is;— “Wisdom and virtue are in his house, and the Knowledge of all things remaineth with him for ever.”