Trembling with excitement, he devours the distance; he cannot stand still when the ram’s horn sounds.
God, having displayed his own power in those creatures that are strong and despise man, here shows it in one scarcely inferior to any of them in strength, and yet very tame and serviceable to man, and that is the horse, especially the horse that is prepared against the day of battle and is serviceable to man at a time when he has more than ordinary occasion for his service.
Commenting on Job 39:19-25
He swalloweth the ground with fierceness and rage,.... Being so eager for the battle, and so full of fierceness and rage, he bounds the plain with such swiftness that he seems rather to swallow up the ground than to run upon it; neither believeth he that it is the sound of the trumpet; for joy at hearing it; or he will not trust to his...
swalloweth--Fretting with impatience, he draws the ground towards 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, when the note of the trumpet (soundeth)."