“Do you give the horse his might? Do you clothe his neck with a mane?
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
Hast thou given the horse strength?.... Not only to bear burdens and draw carriages, but for war; for it is the war horse that is here spoken of, as what follows shows, and his strength denotes; not strength of body only, but fortitude and courage; for which, as well as the other, the horse is eminent, and both are the gift of God, and not...
The allusion to "the horse" (Job 39:18), suggests the description of him. Arab poets delight in praising the horse; yet it is not mentioned in the possessions of Job (Job 1:3; Job 42:12). It seems to have been at the time chiefly used for war, rather than "domestic purposes." thunder--poetically for, "he with arched neck inspires fear as thunder does." Translate, "majesty" [UMBREIT].