1st Corinthians 15:12

9 For I am the least of the apostles, who is not worthy to be called an apostle, because I persecuted the assembly of God.

10 But by the grace of God I am what I am. His grace which was bestowed on me was not found vain, but I worked more than all of them; yet not I, but the grace of God which was with me.

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

12 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?

13 But if there is no resurrection of the dead, neither has Christ been raised.

14 If Christ has not been raised, then our preaching is in vain, and your faith also is in vain.

15 Yes, we are found false witnesses of God, because we testified about God that he raised up Christ, whom he didn`t raise up, if it is so that the dead are not raised.