
“A study of the few still existing apocryphal books discloses the fact, ignored by most modern writers on the Cabala and Essenism, that “the mystic lore” occasionally alluded to in the Talmudic or Midrashic literature is not only much more systematically presented in these older writings, but gives ample evidence of a continuous cabalistic tradition; inasmuch as the mystic literature of the geonic period (approximately from the seventh century until the eleventh century (600-1,000 CE) 1) is only a fragmentary reproduction of the ancient apocalyptic writings.
“The Book of the Secrets of Enoch casts a flood of light upon the rabbinical cosmogony by its realistic description of the process of creation. Here are found the primal elements, “the stones of fire” out of which “the Throne of Glory” is made, and from which the angels emanate; “the glassy sea” …

beneath which the seven heavens, formed of fire and water …

are stretched out, and the founding of the world upon the abyss …

the preexistence of human souls and the formation of man by the Creative Wisdom out of seven substances, the ten classes of angels (ch. xx.); and, in ch. xxii., version A, ten heavens instead of seven;
also an advanced chiliastic calendar system (ch. xv.-xvi., xxxii.).
Its cabalistic character is shown by references to the writings of Adam, Seth, Cainan, Mahalalel, and Jared (ch. xxxiii. 10, and elsewhere).
From:–
https://jewishencyclopedia.com/articles/3878-cabala#anchor4
(https://jewishencyclopedia.com/)
https://duckduckgo.com/?q=book+of+secrets+of+enoch+text+pdf&t=ofa&ia=web
https://ia800501.us.archive.org/22/items/bookofsecretsofe00morf/bookofsecretsofe00morf_bw.pdf