1 Corinthians 15:20-34

But in fact Christ has been raised from the dead, the first fruits of those who have died. For since death came through a human being, the resurrection of the dead has also come through a human being; for as all die in Adam, so all will be made alive in Christ. But each in his own order: Christ the first fruits, then at his coming those who belong to Christ. Then comes the end, when he hands over the kingdom to God the Father, after he has destroyed every ruler and every authority and power. For he must reign until he has put all his enemies under his feet. The last enemy to be destroyed is death. For ‘God has put all things in subjection under his feet.’ But when it says, ‘All things are put in subjection’, it is plain that this does not include the one who put all things in subjection under him.When all things are subjected to him, then the Son himself will also be subjected to the one who put all things in subjection under him, so that God may be all in all.

Otherwise, what will those people do who receive baptism on behalf of the dead? If the dead are not raised at all, why are people baptized on their behalf?

And why are we putting ourselves in danger every hour? I die every day! That is as certain, brothers and sisters, as my boasting of you—a boast that I make in Christ Jesus our Lord. If with merely human hopes I fought with wild animals at Ephesus, what would I have gained by it? If the dead are not raised,
‘Let us eat and drink,
for tomorrow we die.’
Do not be deceived:
‘Bad company ruins good morals.’
Come to a sober and right mind, and sin no more; for some people have no knowledge of God. I say this to your shame.