The following is the results of your search for Baptism for the dead.
Baptism for the dead: Only mentioned in
(1 Corinthians 15:29) This expression as used by the
apostle may be equivalent to saying, "He who goes through a baptism
of blood in order to join a glorified church which has no existence
[i.e., if the dead rise not] is a fool." Some also regard the
statement here as an allusion to the strange practice which began, it
is said, to prevail at Corinth, in which a person was baptized in the
stead of others who had died before being baptized, to whom it was
hoped some of the benefits of that rite would be extended. This they
think may have been one of the erroneous customs which Paul went to
Corinth to "set in order."