Adam Clarke on Job 15:24

Trouble and anguish shall make him afraid - He shall be in continual fear of death; being now brought down by adversity, and stripped of all the goods which he had got by oppression, his life is a mark for the meanest assassin.

As a king ready to the battle - The acts of his wickedness and oppression are as numerous as the troops he commands; and when he comes to meet his enemy in the field, he is not only deserted but slain by his troops. How true are the words of the poet: -

Ad generum Cereris sine caede et vulnere pauci

Descendunt reges, et sicca morte tyranni.

Juv. Sat., ver. 112. "For few usurpers to the shades descend

By a dry death, or with a quiet end."