For the mountains yield food for him where all the wild beasts play.
God, for the further proving of his own power and disproving of Job's pretensions, concludes his discourse with the description of two vast and mighty animals, far exceeding man in bulk and strength, one he calls behemoth, the other leviathan. In these verses we have the former described.
Commenting on Job 40:15-24
He lieth under the shady trees, in the covert of the reed, and fens. This may be thought to agree very well with the river horse, the inhabitant of the Nile, where reeds in great plenty grew, and adjoining to which were fenny and marshy places, and shady trees; and, as historians relate (e), this creature takes its lodging among high reeds, and in shady...
The mountain is not his usual haunt. BOCHART says it is sometimes found there (?). beasts . . . play--a graphic trait: though armed with such teeth, he lets the beasts play near him unhurt, for his food is grass.