It also says Exegol was a dark desert planet located within the Unknown Regions that, according to legend, was the hidden redoubt world of the Sith...It was also the birthplace of Supreme Leader Snoke, whom (Sith Lord Darth) Sidious created to rule the First Order while concealing himself in the shadows. Exegol was used to hide the Final Order, which was a fleet amassed by Sidious and the Sith Eternal, from where they planned to deploy the Star Destroyers and establish a new Sith Empire.Exegol does not appear on any star chart. But legend describes it as the hidden world of the Sith. ~C-3PO
This sounds eerily similar to end-time prophecy, with the evil and the destruction coming out of the north/hidden region, beyond the river Euphrates (abyss/pit) where an army was prepared for a particular day and hour.