Revelation 2:12

And by the messenger of the congregation which is in Pergamos, write: These things says he who has the sharp two-edged sword:

Revelation 1:16

and he had in his right hand seven stars, and out of his mouth there went a sharp two-edged sword; and his countenance was as the sun, when he shines in his strength.

Revelation 1:11

saying, What you see, write in a book, and send it to the seven congregations; to Ephesus, and to Smyrna, and to Pergamos, and to Thyatira, and to Sardis, and to Philadelphia, and to Laodicea.

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 2:1

By the messenger of the congregation in Ephesus, write: These things, says he who holds the seven stars in his right hand, who walks in the midst of the seven golden lamps:

Revelation 19:15

And there went out of his mouth a sharp sword, that with it he might smite the nations: and he shall govern them with a rod of iron; and he treads the wine press of the indignation and wrath of almighty God.

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.

Treasury of Scripture Knowledge

Summary

And to the angel of the church in Pergamos write; These things saith he which hath the sharp sword with two edges;

Bible References

The angel

Revelation 2:1
By the messenger of the congregation in Ephesus, write: These things, says he who holds the seven stars in his right hand, who walks in the midst of the seven golden lamps:
Revelation 1:11
saying, What you see, write in a book, and send it to the seven congregations; to Ephesus, and to Smyrna, and to Pergamos, and to Thyatira, and to Sardis, and to Philadelphia, and to Laodicea.

Which hath

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 1:16
and he had in his right hand seven stars, and out of his mouth there went a sharp two-edged sword; and his countenance was as the sun, when he shines in his strength.
Revelation 19:15
And there went out of his mouth a sharp sword, that with it he might smite the nations: and he shall govern them with a rod of iron; and he treads the wine press of the indignation and wrath of almighty God.