D&C 2

Moroni shared the prophecy of Malachi with some important variances saying - 

"Behold, I will reveal unto you the Priesthood, by the hand of Elijah the prophet, before the coming of the great and dreadful day of the Lord.

2 And he shall plant in the hearts of the children the promises made to the fathers, and the hearts of the children shall turn to their fathers.

3 If it were not so, the whole earth would be utterly wasted at his coming."  (Doctrine and Covenants 2:1–3)

Understand true doctrine, this version makes more sense to me.