Revelation given through Joseph Smith the Prophet to Peter Whitmer Jr., at Fayette, New York, June 1829 (see the heading to section 14). Peter Whitmer Jr. later became one of the Eight Witnesses to the Book of Mormon.
1 aHearken, my servant Peter, and listen to the words of Jesus Christ, your Lord and your Redeemer.
2 For behold, I speak unto you with sharpness and with power, for mine arm is over all the earth.
3 And I will tell you that which no man knoweth save me and thee alone—
4 For many times you have desired of me to know that which would be of the most worth unto you.
5 Behold, blessed are you for this thing, and for speaking my words which I have given unto you according to my commandments.
6 And now, behold, I say unto you, that the thing which will be of the most worth unto you will be to declare repentance unto this people, that you may bring souls unto me, that you may rest with them in the kingdom of my Father. Amen.