Grimoire Encyclopædia

The demon Asmoday appears in the grimoires Book of Incantations, The Black Books of Elverum, Hygromanteia, The Magus, Testament of Solomon, The Discoverie of Witchcraft, The Book of Spirits, The Book of the Office of Spirits, Three Books of Occult Philosophy, The Book of Abramelin, The Book of Oberon, Five Books of Mystery, Pseudomonarchia Daemonum, The Lesser Key of Solomon, Paradise Lost, and Dictionnaire Infernal

From Testament of Solomon, F. C. Conybeare edition:

Asmoday

"I am called Asmodeus among mortals, and my business is to plot against the newly wedded, so that they may not know one another. And I sever them utterly by many calamities, and I waste away the beauty of virgin women, and estrange their hearts."

From The Lesser Key of Solomon, Crowley/Mathers edition:

Asmoday

The Thirty-second Spirit is Asmoday, or Asmodai. He is a Great King, Strong, and Powerful. He appeareth with Three Heads, whereof the first is like a Bull, the second like a Man, and the third like a Ram; he hath also the tail of a Serpent, and from his mouth issue Flames of Fire. His Feet are webbed like those of a Goose. He sitteth upon an Infernal Dragon, and beareth in his hand a Lance with a Banner. He is first and choicest under the power of Amaymon, he goeth before all other. When the Exorcist hath a mind to call him, let it be abroad, and let him stand on his feet all the time of action, with his Cap or Head-dress off; for if it be on, Amaymon will deceive him and cause all his actions to be bewrayed. But as soon as the Exorcist seeth Asmoday in the shape aforesaid, he shall call him by his Name, saying: "Art thou Asmoday?" and he will not deny it, and by-and-by he will bow down unto the ground. He given the Ring of Virtues; he teacheth the Arts of Arithmetic, Astronomy, Geometry, and all handicrafts absolutely. He giveth true and full answers unto thy demands. He maketh one Invincible. He showeth the place where Treasures lie, and guardeth it. He, amongst the Legions of AMAYMON, governeth 72 Legions of Spirits Inferior. His Seal is this which thou must wear as a Lamen upon thy breast, etc.