1 Corinthians 15:2

By which also ye are saved, if ye keep in memory what I preached unto you, unless ye have believed in vain.

by which also you are saved, if you hold firmly the word which I preached to you--unless you believed in vain.

by which also ye are saved, if ye hold fast the word which I preached unto you, except ye believed in vain.

through which also ye are being saved, in what words I proclaimed good news to you, if ye hold fast, except ye did believe in vain,

By this gospel you are saved, if you hold firmly to the word I preached to you. Otherwise, you have believed in vain.