D&C 17

In the front of every Book of Mormon is this testimony -

THE TESTIMONY OF THREE WITNESSES

BE IT KNOWN unto all nations, kindreds, tongues, and people, unto whom this work shall come: That we, through the grace of God the Father, and our Lord Jesus Christ, have seen the plates which contain this record, which is a record of the people of Nephi, and also of the Lamanites, their brethren, and also of the people of Jared, who came from the tower of which hath been spoken. And we also know that they have been translated by the gift and power of God, for his voice hath declared it unto us; wherefore we know of a surety that the work is true. And we also testify that we have seen the engravings which are upon the plates; and they have been shown unto us by the power of God, and not of man. And we declare with words of soberness, that an angel of God came down from heaven, and he brought and laid before our eyes, that we beheld and saw the plates, and the engravings thereon; and we know that it is by the grace of God the Father, and our Lord Jesus Christ, that we beheld and bear record that these things are true. And it is marvelous in our eyes. Nevertheless, the voice of the Lord commanded us that we should bear record of it; wherefore, to be obedient unto the commandments of God, we bear testimony of these things. And we know that if we are faithful in Christ, we shall rid our garments of the blood of all men, and be found spotless before the judgment-seat of Christ, and shall dwell with him eternally in the heavens. And the honor be to the Father, and to the Son, and to the Holy Ghost, which is one God. Amen.

OLIVER COWDERY
DAVID WHITMER
MARTIN HARRIS
(Book of Mormon Preface 3 Witnesses:Heading - 1)

It is the firm and solemn testimony of three witnesses who were promised to -

"...have a view of the plates, and also of the breastplate, the sword of Laban, the Urim and Thummim, which were given to the brother of Jared upon the mount, when he talked with the Lord face to face, and the miraculous directors which were given to Lehi while in the wilderness, on the borders of the Red Sea." (Doctrine and Covenants Section 17:1)

And as such were commanded to -

"...testify that you have seen them, even as my servant Joseph Smith, Jun., has seen them..." (Doctrine and Covenants Section 17:5)

But even with the testimonies of the Prophet Joseph Smith and these three witnesses, I was touched by the testimony of the Savior Himself regarding the Prophet and the Book of Mormon -

"...he has translated the book, even that part which I have commanded him, and as your Lord and your God liveth it is true." (Doctrine and Covenants Section 17:6)