Isaiah 27:1
Amplified Bible (AMP)
IN THAT day [the Lord will deliver Israel from her enemies and also from the rebel powers of evil and darkness] His sharp and unrelenting, great, and strong sword will visit and punish Leviathan the swiftly fleeing serpent, Leviathan the twisting and winding serpent; and He will slay the monster that is in the sea.— Isaiah 27:1 (AMP)