Albert Barnes Commentary Psalms 83:14

"As the fire that burneth the forest, And as the flame that setteth the mountains on fire," — Psalms 83:14 (ASV)

As the fire burneth a wood ... - The same idea is here presented under another form. No image of desolation is more fearful than that of fire raging in a forest; or of fire on the mountains. As trees and shrubs and grass fall before such a flame, so the prayer is, that those who had combined against the people of God might be swept away by his just displeasure.