English Standard Version
and by which you are being saved, if you hold fast to the word I preached to you--unless you believed in vain.New International Version
By this gospel you are saved, if you hold firmly to the word I preached to you. Otherwise, you have believed in vain.Catholic Public Domain Version
By the Gospel, too, you are being saved, if you hold to the understanding that I preached to you, lest you believe in vain