The Doctrine of Christ
“… for he will visit him with fire and with the Holy Ghost.  And thus will the Father bear record of me, and the Holy Ghost will bear record unto him of the Father and me; for the Father, and I, and the Holy Ghost are one.
And again I say unto you, ye must repent, and become as a little child, and be baptized in my name, or ye can in nowise receive these things. …