Remember these, O Jacob and Israel; for thou art my servant: I have formed thee; thou art my servant: O Israel, thou shalt not be forgotten of me. I have blotted out, as a thick cloud, thy transgressions, and, as a cloud, thy sins: return unto me; for I have redeemed thee. Sing, O ye heavens; for the LORD hath done it: shout, ye lower parts of the earth: break forth into singing, ye mountains, O forest, and every tree therein: for the LORD hath redeemed Jacob, and glorified himself in Israel.
Israel was called to remember that God is their Creator who never forgets them, and that they are His servant. He has blotted out the cloud of transgressions that hid His face from them; He has bought them back from bondage, and invited them to return to Him. All creation was invited to sing and shout, because the LORD has redeemed Jacob.