Question: what does the bible say about baptism by proxy?
Answer: As Peter affirmed in Acts 2:37–38, the next step after acceptance of the gospel is baptism for the remission of sins, which "doth also now save us" (KJV 1 Peter 3:21). The LDS Church teaches that those in the afterlife who have been baptized by proxy are free to accept or reject the ordinance done on their behalf.