Moroni 8:29

And after rejecting so great a knowledge, my son, they must perish soon, unto the fulfilling of the prophecies which was spoken by the prophets, as well as the words of our Saviour himself.

After rejecting such great knowledge, my son, they will die soon. This will fulfill what the prophets said would happen, and also what our Savior himself said.

“After rejecting so much truth, son, they’re going to be destroyed soon. The prophecies will be fulfilled—both what the prophets said and what our Savior himself spoke.”