"Behold, thou shalt not"

1. Alma 20: 17
     17 But Ammon stood forth and said unto him: Behold, thou shalt not slay thy son; nevertheless, it were better that he should fall than thee, for behold, he has repented of his sins; but if thou shouldst fall at this time, in thine anger, thy soul could not be saved.
2. Ether 3: 21
     21 And it came to pass that the Lord said unto the brother of Jared: Behold, thou shalt not suffer these things which ye have seen and heard to go forth unto the world, until the time cometh that I shall glorify my name in the flesh; wherefore, ye shall treasure up the things which ye have seen and heard, and show it to no man.