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.
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 2:12
"And write [this] to the angel of the church at Pergamum: These are the words of Him who has the sharp double-edged sword:
Luke 23:46
Jesus called out in a loud voice, "Father, I commit my spirit into your hands." And after He said this, He gave up His spirit [i.e., to God in death].
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.