In the apocryphal Book of Enoch, Mount Hermon is the place where the Watcher class of fallen angels descended to Earth. They swear upon the mountain that they would take wives among the daughters of men and take mutual imprecation for their sin (Enoch 6)
According to the controversial research by Professor Israel Knohl of the Hebrew University, in his book "Hashem", Mount Hermon is actually the Mount Sinai mentioned in the Hebrew Bible, with the biblical story reminiscent of an ancient battle of the northern tribes with the Egyptians somewhere in the Jordan valley or Golan heights.