Parallel
1 Corinthians 15:2
King James Version (1769 Blayney revision, with Apocrypha) · Berean Standard Bible
By which also ye are saved, if ye keep in memory (note: Or, hold fast) what I preached (note: Gr. by what speech) unto you, unless ye have believed 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.