Easton's Bible Dictionary: M. G. Easton, M.A., D.D.
Only in Isa. 14:13, a mythic mountain of the Babylonians, regarded by them as the seat of the gods. It was situated in the far north, and in Babylonian inscriptions is described as a mountain called Im-Kharasak, "the mighty mountain of Bel, whose head reaches heaven, whose root is the holy deep." In their geography they are said to have identified it with mount El-wend, near Ecbatana.