Tehom

Tehom is a Northwest Semitic and Biblical Hebrew word meaning "the deep" or "abyss". It is used to describe the primeval ocean and the post-creation waters of the earth. It is a cognate of the Akkadian words tiāmtum and tâmtum as well as Ugaritic t-h-m which have similar meanings. According to a theological dictionary, tehom derives from a Semitic root which denoted the sea as a non-personified entity with mythological import.

Genesis

Tehom is mentioned in Genesis 1:2, where it is translated as "deep":
The same word is used for the origin of Noah's flood in :

Gnosticism

used Genesis 1:2 to propose that the original creator deity, called the Pléroma "Totality" or Bythós "Deep," preexisted Elohim and gave rise to such later divinities and spirits by way of emanations, progressively more distant and removed from the original form.
In Mandaean cosmology, the Sea of Suf is a primordial sea in the World of Darkness.

Kabbalah

Tehom is also mentioned as the first of seven "Infernal Habitations" that correspond to the ten qlippoth of Jewish Kabbalistic tradition, often in place of Sheol.

Sanchuniathon

Robert R. Stieglitz stated that Eblaitic texts demonstrate the equation of the goddess Berouth in the mythology of Sanchuniathon with Ugaritic thmt and Akkadian Tiâmat, as the sea was called tihamatum, and also buʾrâtum = Canaanite beʾerôt.