“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. piercing: or, crossing like a bar”
That is, by his mighty power, and by his word. He prophesieth here of the destruction of Satan and his kingdom under the name of Leviathan, Assyria, and Egypt. At the time appointed.