"The strength thereof"

1. Jacob 5: 73
   73 And there began to be the natural fruit again in the vineyard; and the natural branches began to grow and thrive exceedingly; and the wild branches began to be plucked off and to be cast away; and they did keep the root and the top thereof equal, according to the strength thereof.
2. 3 Ne. 3: 14
   14 And he caused that fortifications should be built round about them, and the strength thereof should be exceedingly great. And he caused that armies, both of the Nephites and of the Lamanites, or of all them who were numbered among the Nephites, should be placed as guards round about to watch them, and to guard them from the robbers day and night.