ישעיהו נה:יב פירוש: רש״י ואבן עזרא

For with joy shall you go forth from the exile.

For you shall go out with joy. You will go out from the exile joyfully.

the mountains and the hills shall burst into song before you for they will give you their fruit and their plants, and their inhabitants shall derive benefit. ([Some editions read:] And their inhabitants shall sing.)