1 Corinthians 15:8-12

and last of all, as to one untimely born, He appeared to me also.

For I am the least of the apostles, and not fit to be called an apostle, because I persecuted the church of God.

But by the grace of God I am what I am, and His grace toward me did not prove vain; but I labored even more than all of them, yet not I, but the grace of God with me.

Whether then it was I or they, so we preach and so you believed.

Now if Christ is preached, that He has been raised from the dead, how do some among you say that there is no resurrection of the dead?