He hath strength answerable to his bulk, but this strength by God's wise and merciful providence is not an offensive strength, consisting in or put forth by horns or claws, as it is in ravenous creatures; but only defensive, and seated in his loins, as it is in other creatures, whereby he is rendered more serviceable to men by the carrying of vast burdens. His force is in the navel of his belly; which though in the elephant it be weaker than his loins, whence the rhinoceros fighting with him aims at that part; yet hath a more than ordinary strength in it, as appears by the binding of the heaviest burdens under and about it. This also agrees to the hippopotamus in an eminent degree, whose whole skin is noted by ancient writers to be harder than any other creature s, and almost impenetrable.
Related Commentaries of Job 40:16
Job 40:16
16 Lo now, his strength is in his loins, and his force is in the navel of his belly.