Second Isaiah has a call for the heavens to sing for joy. The earth should exult. The mountains should also break into singing. Yahweh has comforted his people. He has had compassion on those who were suffering.
Second Isaiah has this chant of joy. The heavens were to sing about what Yahweh has done. The depths of the earth should shout. The mountains and the forests, with all its trees, should break into singing. Yahweh has redeemed Jacob so that he should be glorified in Israel.