The Book Of Mormon

And now, behold, I would speak somewhat unto the remnant of this people who are spared, if it so be that God may give unto them my words, that they may know of the things of their fathers; yea, I speak unto you, ye remnant of the house of Israel; and these are the words which I speak: Know ye that ye are of the house of Israel.

Know ye that ye must come unto repentance, or ye cannot be saved.