Adam Clarke on Job 4:10

The roaring of the lion - By the roaring lion, fierce lion, old lion, stout lion, and lion's whelps, tyrannous rulers of all kinds are intended. The design of Eliphaz in using these figures is to show that even those who are possessed of the greatest authority and power - the kings, rulers, and princes of the earth - when they become wicked and oppressive to their subjects are cast down, broken to pieces, and destroyed, by the incensed justice of the Lord; and their whelps - their children and intended successors, scattered without possessions over the face of the earth.