break forth into singing. This word (Hebrew. pazah) occurs once in the "former" portion (here), and five times in the "latter" portion (Isaiah 44:23; Isaiah 49:13; Isaiah 52:9; Isaiah 54:1; Isaiah 55:12). See App-92.
Related Commentaries of Isaiah 14:7
Isaiah 14:7
7 The whole earth is at rest, and is quiet: they break forth into singing.