Arcana Coelestia # 1665
1665. Verse 3 All these were gathered together at the valley of Siddim, which is the Salt Sea.
'All these were gathered together at the valley of Siddim' means that they were immersed in the unclean things that go with evil desires. 'Which is the Salt Sea' means the foul things that accompany derivative falsities.
Daniel 12:1
1
"At that time shall Michael stand up, the great prince who stands for the children of your people; and there shall be a time of trouble, such as never was since there was a nation even to that same time: and at that time your people shall be delivered, everyone who shall be found written in the book.