"Should never perish"

1. 1 Ne. 5: 19
   19 Wherefore, he said that these plates of brass should never perish; neither should they be dimmed any more by time. And he prophesied many things concerning his seed.
2. 2 Ne. 25: 21
   21 Wherefore, for this cause hath the Lord God promised unto me that these things which I write shall be kept and preserved, and handed down unto my seed, from generation to generation, that the promise may be fulfilled unto Joseph, that his seed should never perish as long as the earth should stand.