ישעיהו יד:ח פירוש: רש״י ואבן עזרא

Box trees, too, rejoiced Rulers, too, rejoiced [from Jonathan]; i.e., they rejoiced at your downfall.

Yea, the fir trees, etc. For he had caused the fir trees and the cedars to be hewn down, to build with them fortresses and ramparts.