In 3 Nephi 24:1 Jesus commanded that the words the Father had given unto Malachi should be written. And these words he specifically told them, saying:
Thus said the Father unto Malachi--Behold, I will send my messenger, and he shall prepare the way before me, and the Lord whom ye seek shall suddenly come to his temple, even the messenger of the covenant . . .
The meaning of the Hebrew name Malachi is literally "my messenger." [Tyndale House, The Illustrated Bible Dictionary, Vol. 2, p. 937] [See the commentary on 3 Nephi 25:4, 5]