Parallel
1 Corinthians 15:2
Nestle 1904 Greek New Testament · Berean Standard Bible
δι’ οὗ καὶ σῴζεσθε τίνι λόγῳ εὐηγγελισάμην ὑμῖν εἰ κατέχετε ἐκτὸς εἰ μὴ εἰκῇ ἐπιστεύσατε
By this gospel you are saved, if you hold firmly to the word I preached to you. Otherwise, you have believed in vain.