Prophesies of the Last Days

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5  Behold, I will send you Elijah the prophet before the coming of the great and dreadful day of the Lord;
6  And he shall turn the heart of the fathers to the children, and the heart of the children to their fathers, lest I com
e and smite the earth with a curse.

(Book of Mormon | 3 Nephi 25:5 - 6)