Brimstone and salt
In Deuteronomy 29:33, this signifies the vastation of good and truth, for these destroy the earth and its produce as lusts destroy goods and falsities destroy truths. (Arcana Coelestia 1666)
Joshua 11:16-17
16
So Joshua captured all that land, the hill country, all the South, all the land of Goshen, the lowland, the Arabah, the hill country of Israel, and the lowland of the same;
17
from Mount Halak, that goes up to Seir, even to Baal Gad in the valley of Lebanon under Mount Hermon. He took all their kings, struck them, and put them to death.