Hyperbole

A hyperbole is a figure of speech which is characterized by extravagant exaggeration.

If only my anguish could be weighed and all my misery be placed on the scales! It would surely outweigh the sand of the seas. (Job 6:2,3a)

Job is attempting to describe the intensity of his misery by comparing it to the extremely large number of sand grains and the enormous weight of this sand.