1 Corinthians 15:29

Otherwise, what do people mean by having themselves baptized on behalf of their dead? If the dead do not rise at all, why do they have themselves baptized on their behalf?

Matthew 20:22

But Jesus answered, "You do not know what you are asking for! Can you drink what I am going to drink?" They answered, "Yes, we can."

Romans 6:3-4

Do you not know that all of us who have been baptized into union with Christ Jesus have been baptized into his death?

1 Corinthians 15:16

For if the dead are never raised, Christ was not raised;

1 Corinthians 15:32

From the human point of view, what good is it to me that I have fought wild animals here in Ephesus? If the dead do not rise at all, "Let us eat and drink, for we will be dead tomorrow!"

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 are never raised, Christ was not raised;
Romans 6:3
Do you not know that all of us who have been baptized into union with Christ Jesus have been baptized into his death?
Matthew 20:22
But Jesus answered, "You do not know what you are asking for! Can you drink what I am going to drink?" They answered, "Yes, we can."