Isaiah 27:1
1In that day, the LORD with his hard and great and strong sword will punish leviathan, the fleeing serpent, and leviathan, the twisted serpent; and he will kill the dragon that is in the sea.
Wesley: Leviathan—by this leviathan, serpent and dragon (for all signify the same thing) he understands some powerful enemy or enemies of God, and of his church or people, which may well be called by these names, partly for their great might, and partly for the great terror and destruction which they cause upon the earth. The piercing—which by its sting pierces deeply into mens bodies. Crooked serpent—winding and turning itself with great variety and dexterity. Whereby he seems to signify the craftiness and activity of this enemy, whose strength makes it more formidable. Both readings: the LORD’s sword on the serpent.
Enemy of the church in that age.
Calvin: in that day. Here the Prophet speaks in general of the judgment of God, and thus includes the whole of Satan’s kingdom. Having spoken of vengeance against tyrants who shed innocent blood, he now publishes this proclamation. On leviathan: a large serpent, or whales and sea-fishes, monsters for their size. The description applies to the king of any proud empire that crushed the church, and to the kingdom of Satan standing behind such tyrants. The hard, great, and strong sword is the Lord’s.
The LORD punishes leviathan, the fleeing and twisting serpent.
Key contrast Both hear Leviathan as a powerful enemy of God and the church, slain by the LORD’s sword in that day. Arminians follow Wesley’s piercing and crooked serpent as might and craft of some enemy of the people. Reformed readers side with Calvin’s further word: the judgment includes the whole of Satan’s kingdom, sea-monsters figuring tyrants who shed innocent blood.