Revelation 2:16

Reform, or otherwise, I will come to you quickly, and I will fight against them with the sword of my mouth.

Revelation 12:3-2

And there appeared another sign in heaven; and, behold! a great fiery dragon, having seven heads and ten horns, and upon his heads seven crowns.

Revelation 13:4

and they worshiped the dragon who gave authority to the wild beast, saying, Who is like to the beast? who can war against it?

Revelation 13:11

And I saw another beast ascending out of the earth, and it had two horns like a lamb: but it spoke like a dragon.

Revelation 16:13

And I saw, and out of the mouth of the dragon, and out of the mouth of the beast, and out of the mouth of the false prophet there came forth three unclean spirits, like frogs:

Revelation 17:1

And one of the seven angels who had the seven vials, came and spoke with me, saying, Come, and I will show you the judgment of the great harlot, that sits upon many waters:

Revelation 17:15

And he said to me, The waters which you saw, on which the harlot sat, are people, and multitudes, and nations, and tongues.

Revelation 19:21

And the rest were slain with the sword that came out of the mouth of him who sat on the horse: and all the birds were satiated with their flesh.

Revelation 20:2

And he laid hold on the dragon, that old serpent, who is the Devil, and Satan, and bound him for a thousand years;

Treasury of Scripture Knowledge

Summary

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.

Bible References

With his

Revelation 2:16
Reform, or otherwise, I will come to you quickly, and I will fight against them with the sword of my mouth.
Revelation 19:21
And the rest were slain with the sword that came out of the mouth of him who sat on the horse: and all the birds were satiated with their flesh.

In the sea

Revelation 13:1
And I stood upon the sand of the sea, and saw a savage beast ascending out of the sea, having seven heads and ten horns; and upon its horns were ten diadems; and on its heads were the named of defamation.
Revelation 17:1
And one of the seven angels who had the seven vials, came and spoke with me, saying, Come, and I will show you the judgment of the great harlot, that sits upon many waters: