Hear attentively the noise of his voice, and the sound that goeth out of his mouth.
Hear attentively - the thunder ("noise"), etc., and then you will feel that there is good reason to tremble.
Sound - muttering of the thunder.
Related Commentaries of Job 37:2
Job 37:2
2 Heara attentively the noise of his voice, and the sound that goeth out of his mouth.