1 Corinthians 15:6, 17, 42
1 Corinthians 15:6 ESV
Then he appeared to more than five hundred brothers at one time, most of whom are still alive, though some have fallen asleep.
1 Corinthians 15:17 ESV
And if Christ has not been raised, your faith is futile and you are still in your sins.
1 Corinthians 15:42 ESV
So is it with the resurrection of the dead. What is sown is perishable; what is raised is imperishable.