Here is Joseph Smith's letter to Newel K. Whitney giving the entire Whitney family eternal salvation in exchange for his permission for Smith to marry his daughter, Sarah Ann.

This is a somewhat famous letter written by Joseph Smith to Newel K. Whitney. It is written in the guise of one of Smith's unpublished revelations, dated July 27, 1842. This letter is cementing the deal for Whitney's permission to marry his 17-year old daughter, Sarah Ann. Smith offers eternal rewards in exchange for the martial right, presumably, conjugal rights. The marriage was performed later that day by Sarah's father.^1 Smith's letter even included the the exact language for Whitney to use in the ceremony.

Many would-be prophets and their followers have recently found themselves in jail for pawning their young daughters in exchange for exaltation. Smith called this letter a revelation. Today it would be called evidence to prove that a conspiracy existed between the two.

Here is the definitive prototype written by Smith, and still employed by the fundamentalists today, for posterity. Smith, July 27, 1842:

1^. Verily, thus saith the Lord unto my servant Newel K. Whitney,

2^. The thing that my servant Joseph Smith has made known unto you and your family and which you have agreed upon is right in mine eyes,

3^. And shall be crowned upon your heads with honor and immortality and eternal life to all your house, both old and young because of the lineage of my Priesthood, saith the Lord,

4^. It shall be upon you and upon your children after you from generation to generation, by virtue of the holy promise which I now make unto you, saith the Lord.

5^. These are the words which you shall pronounce upon my servant Joseph and our daughter Sarah Ann Whitney.

6^. They shall take each other by the hand and you shall say

7^. You both mutually agree, calling them by name, to be each other’s companion so long as you both shall live, preserving yourselves for each other and from all others, and also throughout all eternity, reserving only those rights which have been given to my servant Joseph by revelation and commandment and by legal authority in times past.

8^. If you both agree to covenant and do this, then I give you Sarah Ann Whitney, my daughter, to Joseph Smith, to be his wife, to observe all the rights between you both that belong to that condition.

9^. I do it in my own name and in the name of my wife, your mother, and in the name of my holy progenitors, by right of birth which is of right of birth which is of [the] priesthood, vested in me by revelation and commandment and promise of the living God, obtained by the Holy Melchizedek Jethro and other of the Holy Fathers commanding in the name of the Lord all those powers to concentrate in you and through [you] to your posterity forever.

10^. All these things I do in the name of the Lord Jesus Christ, that through this order he may be glorified and [that] through the power of anointing David may reign King over Israel, which shall hereafter be revealed.

11^. Let immortality and eternal life henceforth be sealed upon your heads forever and ever.

[reference:] (Joseph Smith Collection, Church Historians Office, see also The Contributor Vol. 6:131, January 1885)*