1 Corinthians 15:2

2byδι’whichοὗalsoκαὶyou are being savedσῴζεσθε,to theτίνιwordλόγῳI proclaimedεὐηγγελισάμηνto youὑμῖν,ifεἰyou hold fastκατέχετε,unlessἐκτὸςifεἰnotμὴin vainεἰκῇyou have believedἐπιστεύσατε.

by which you⁺ are also being saved in what word I proclaimed to you⁺, if you⁺ hold fast—unless you⁺ believed in vain.