Liber AL vel Legis is the central sacred text of Thelema, written down from dictation mostly by Aleister Crowley, although Rose Edith Crowley is also known to have written two phrases into the manuscript of the Book after its dictation. Crowley claimed it was dictated to him by a discarnate entity named Aiwass or Aiwaz. However, the three chapters are largely written in the first person by the Thelemic deities Nuit, Hadit, and Ra-Hoor-Khuit respectively, rather than by Aiwass/Aiwaz.