Berean Study Bible
After all, it is only right for God to repay with affliction those who afflict you,

King James Bible
Seeing it is a righteous thing with God to recompense tribulation to them that trouble you;

American Standard Version
if so be that it is righteous thing with God to recompense affliction to them that afflict you,

Darby Bible Translation
if at least [it is a] righteous thing with God to render tribulation to those that trouble you,

Douay-Rheims Bible
Seeing it is a just thing with God to repay tribulation to them that trouble you:

English Revised Version
if so be that it is a righteous thing with God to recompense affliction to them that afflict you,

Young's Literal Translation
since it is a righteous thing with God to give back to those troubling you -- trouble,