He swalloweth the ground with fierceness and rage: neither believeth he that it is the sound of the trumpet.
Swalloweth - fretting with impatience, he draws the ground toward him with his hoof, as if he would swallow it. The parallelism shows this to be the sense: not, as Maurer, 'scours over it.'
Neither believeth - for joy. Rather, 'he will not stand still х ya'ªmiyn (H539), from 'aameen (H543), to be firm] when the note of the trumpet' (soundeth).