1 Corinthians 15:29

Or else what will they do who are baptized for the dead? If the dead aren't raised at all, why then are they baptized for the dead?

Matthew 20:22

But Jesus answered, "You don't know what you are asking. Are you able to drink the cup that I am about to drink, and be baptized with the baptism that I am baptized with?" They said to him, "We are able."

Romans 6:3-4

Or don't you know that all we who were baptized into Christ Jesus were baptized into his death?

1 Corinthians 15:16

For if the dead aren't raised, neither has Christ been raised.

1 Corinthians 15:32

If I fought with animals at Ephesus for human purposes, what does it profit me? If the dead are not raised, then "let us eat and drink, for tomorrow we die."

Treasury of Scripture Knowledge

Summary

Else what shall they do which are baptized for the dead, if the dead rise not at all? why are they then baptized for the dead?

Bible References

What

1 Corinthians 15:16
For if the dead aren't raised, neither has Christ been raised.
Romans 6:3
Or don't you know that all we who were baptized into Christ Jesus were baptized into his death?
Matthew 20:22
But Jesus answered, "You don't know what you are asking. Are you able to drink the cup that I am about to drink, and be baptized with the baptism that I am baptized with?" They said to him, "We are able."