3 Nephi 8:60 "And now behold, this is the commandment which I give unto you - That ye shall not suffer anyone knowingly to partake of My flesh and blood
unworthily when ye shall minister it, For whoso eateth and drinketh My flesh and blood
unworthily eateth and drinketh damnation to his soul.
Mormon 4:95 See that ye are not baptized
unworthily; See that ye partake not of the sacrament of Christ
unworthily; But see that ye do all things in worthiness, And do it in the name of Jesus Christ, the Son of the living God; And if ye do this and endure to the end, ye will in no wise be cast out.
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