1 Corinthians 15:29 – 30

29  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?

30  And why stand we in jeopardy every hour?  1 Corinthians 15:29 – 30

Doctrine and Covenants 124:29

29 For a baptismal font there is not upon the earth, that they, my saints, may be baptized for those who are dead—  Doctrine and Covenants 124:29

Doctrine and Covenants 127:5-7

5 And again, I give unto you a word in relation to the baptism for your dead.

6 Verily, thus saith the Lord unto you concerning your dead: When any of you are baptized for your dead, let there be a recorder, and let him be eye-witness of your baptisms; let him hear with his ears, that he may testify of a truth, saith the Lord;

7 That in all your recordings it may be recorded in heaven; whatsoever you bind  on earth, may be bound in heaven; whatsoever you loose on earth, may be loosed in heaven;  Doctrine and Covenants 127:5-7

Doctrine and Covenants 128:1

1 As I stated to you in my letter before I left my place, that I would write to you from time to time and give you information in relation to many subjects, I now resume the subject of the baptism for the dead, as that subject seems to occupy my mind, and press itself upon my feelings the strongest, since I have been pursued by my enemies.  Doctrine and Covenants 128:1

Doctrine and Covenants 138:33

33 These were taught faith in God, repentance from sin, vicarious baptism for the remission of sins, the gift of the Holy Ghost by the laying on of hands,  Doctrine and Covenants 138:33