6 For behold, if ye deny the Holy Ghost when it once has had place in you, and ye know that ye deny it, behold, this is a sin which is unpardonable; yea, and whosoever murdereth against the light and knowledge of God, it is not easy for him to obtain forgiveness; yea, I say unto you, my son, that it is not easy for him to obtain a forgiveness.---------------------------------------------------
7 And now, my son, I would to God that ye had not been guilty of so great a crime. I would not dwell upon your crimes, to harrow up your soul, if it were not for your good.
8 But behold, ye cannot hide your crimes from God; and except ye repent they will stand as a testimony against you at the last day.
Book of Mormon | Alma 39:6-8