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Heaven and Hell: "There are 7 layers to Heaven and Hell. Above Assiah are 7 layers of a sphere called Tenkai or Shikouten, …where the…angels live. At the top of the…tower of Etenamenki, where God lives. [of] Hell…Sheol is the lowest level…The ruler is said to be Lucifer.”
Ten – “Heaven”; Kai – “Assembly?”; Tenkai – “Revolution/Revolve; Expansion” Shi – “City”; Kouten – “Revolutions of Heaven” So…Shi-Kouten, City of Heaven; or Ten-kai – Place of Heaven? (translations freedict.com
Sheol – “The underworld of ancient Semitic belief. …a place of bleak monotony where existence continues at a low ebb. Souls…cannot interact with gods, nor can they communicate with the living. Like…Hades, [it] is a repository of all departed souls. In the Old Testament, Enoch has a vision of Sheol that he declares ‘chaotic, horrible.’” (The Encyclopedia of Hell, Miriam Van Scott.)