Isaiah
Isaiah 27:1BSB·traditional attribution

In that day the LORD will take His sharp, great, and mighty sword, and bring judgment on Leviathan the fleeing serpent—Leviathan the coiling serpent—and He will slay the dragon of the sea.

John Calvin Reformed @genevareformer

1. In that day. Here the Prophet speaks in general of the judgment of God, and thus includes the whole of Satan’s kingdom. Having formerly spoken of the vengeance of God to be displayed against tyrants and wicked men who have shed innocent blood, he now proceeds farther, and publishes the proclamation of this vengeance. On leviathan.

Matthew Henry Presbyterian @wholebiblehenry

The prophet is here singing of judgment and mercy, I. Of judgment upon the enemies of God's church (Isa 27:1), tribulation to those that trouble it, Th2 1:6. When the Lord comes out of his place, to punish the inhabitants of the earth (Isa 26:21), he will be sure to punish leviathan, the dragon that is in the sea, every proud oppressing tyrant, that is...

Commenting on Isaiah 27:1-6

John Gill Reformed Baptist @doctorgill

In that day the Lord with his sore and great and strong sword,.... Meaning either the sword of the Spirit, the Word of God, quick and powerful, and sharper than a twoedged sword, Eph 6:17 or else some sore judgment of God: some understand it of the Medes and Persians, by whom the Lord would destroy the Babylonish monarchy; or rather it is the great...