Aiwass is the name given to a voice that the English occultist and ceremonial magician Aleister Crowley reported to have heard on April 8, 9, and 10 in 1904. Crowley reported that this voice, which he considered originated with a non-corporeal being, dictated a text known as The Book of the Law or Liber AL vel Legis to him through the channeling of his wife Rose Edith Kelly during their honeymoon in Cairo, Egypt.
