1 Corinthians 15:2 in the King James Version
By which also ye are saved, if ye keep in memory what I preached unto you, unless ye have believed in vain.
Context
1 Now I declare to you, brothers, the Good News which I preached to you, which also you received, in which you also stand,
2 by which also you are saved, if you hold firmly the word which I preached to you—unless you believed in vain.
3 For I delivered to you first of all that which I also received: that Christ died for our sins according to the Scriptures,