NET
1 At that time the Lord will punish with his destructive, great, and powerful sword Leviathan the fast-moving serpent, Leviathan the squirming serpent; he will kill the sea monster.
Darby
1 In that day Jehovah, with his sore and great and strong sword, will visit leviathan the fleeing serpent, and leviathan the crooked serpent; and he will slay the monster that is in the sea.
KJV
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.