Leviathan

Job 41:1 Canst thou draw out leviathan with an hook? or his tongue with a cord which thou lettest down?

…

Job 41:34 He beholdeth all high things: he is a king over all the children of pride.

Isaiah 27:1

In that day the LORD with his sore and great and strong sword

shall punish leviathan the piercing serpent,

even leviathan that crooked serpent;

and he shall slay the dragon that is in the sea.(Sea is a prophetic word representing ALL the people of the earth)

Revelation 20:2

And he laid hold on the dragon, that old serpent, which is the Devil, and Satan, and bound him a thousand years,

In prophecy the sea is all the people of the earth, therefore this leviathan is none other than Lucifer, the dragon that is in the prophetic sea which is made up of all the people of the earth.

It is this very same Leviathan that came before God almighty in chapter one, challenging God, concerning Job.

More or less God is singing the praise of Job for withstanding the power of Leviathan, for retaining his integrity and not caving to the unearthly torture which God allowed Lucifer to execute upon his life.