Revelation 2:16

Μετανόησον οὖν· εἰ δὲ μή, ἔρχομαί σοι ταχύ, καὶ πολεμήσω μετ' αὐτῶν ἐν τῇ ῥομφαίᾳ τοῦ στόματός μου.

Metanoēson oyn· ei de mē, erchomai soi tachy, kai polemēsō met' aytōn en tē romphaia toy stomatos moy.

King James Version (KJV)

Repent; or else I will come unto thee quickly, and will fight against them with the sword of my mouth.

Modern English

Repent therefore! Otherwise, I will soon come to you and will fight against them with the sword of my mouth.