'Resurrection of the Dead' in the Bible

Now if Christ be preached that he rose from the dead, how say some among you that there is no resurrection of the dead?

But if there be no resurrection of the dead, then is Christ not risen:

For since by man came death, by man came also the resurrection of the dead.

So also is the resurrection of the dead. It is sown in corruption; it is raised in incorruption: