Revelation 2:12
"And write [this] to the angel of the church at Pergamum: These are the words of Him who has the sharp double-edged sword:
Revelation 1:16
And He had seven stars in His right hand [See verse 20], and a sharp, double-edged sword came out of His mouth. And His face [shone] as the sun, shining in [all] its brilliance.
Revelation 1:11
saying, "Write down in a book what you see and send it to the seven churches: Ephesus, Smyrna, Pergamum, Thyatira, Sardis, Philadelphia and Laodicia" [Note: These seven congregations were all located in western Asia Minor].
Revelation 2:16
So, repent, or I will come to you quickly and will attack those people with the sword of my mouth.
Hebrews 4:12
For God's word is alive and active and sharper than any double-edged sword. It penetrates [deep enough] even to divide [a person's] soul [from his] spirit, and his joints [from his] bone marrow [Note: This is figurative language describing the penetrating effect of God's word into a person's spiritual, inner being] and is able to judge the thoughts and intentions of a person's heart.
Revelation 2:1
"Write [this] to the angel [i.e., the messenger] of the church at Ephesus [Note: These "messengers," (verses 8, 12, 18; 3:1, 7, 14) are thought by some to be evangelists]: These things are the words of the One who holds the seven stars in His right hand and walks among the seven golden lampstands:
Revelation 19:15
And a sharp sword came out of His mouth, with which He would strike down the nations. And He will rule them with an iron staff and will trample on [the grapes of] God Almighty's winepress of anger.
Revelation 19:21
Then the rest of them [i.e., the kings and their armies. Verse 19] were killed with the sword that came out of the mouth of the One riding the horse. And all the birds gorged on their flesh.