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

New King James Version
Repent, or else I will come to you quickly and will fight against them with the sword of My mouth.

American Standard Version
Repent therefore; or else I come to thee quickly, and I will make war against them with the sword of my mouth.

Berean Study Bible
Therefore repent! Otherwise I will come to you shortly and wage war against them with the sword of My mouth.

Douay-Rheims Bible
In like manner do penance: if not, I will come to thee quickly, and will fight against them with the sword of my mouth.

English Revised Version
Repent therefore; or else I come to thee quickly, and I will make war against them with the sword of my mouth.

World English Bible
Repent therefore, or else I am coming to you quickly, and I will make war against them with the sword of my mouth.

Young's Literal Translation
'Reform! and if not, I come to thee quickly, and will fight against them with the sword of my mouth.

Revelation 2:16 Additional Translations ...