Blessing for David Whitmer by Joseph Smith Jr. ... He shall yet stand upon the land of Zion, from whence he has been driven, and shall find inheritance there, and shall be a ruler in Zion until he is old and well stricken in years. ... his testimony shall shine as fair as the Sun, and as a diamond it shall remain untarnished. There shall not be spot upon his character while he lives, neither upon his seed after him unto the latest posterity. ... Given like the foregoing blessings, by vision, to Joseph Smith, Jr. the Seer, September 22, 1835, and recorded Oct. 2, 1835.
[Patriarchal Blessing Book 1:13-14, in Early Patriarchal Blessings of the Church of Jesus Christ of Latter-Day Saints, Joseph Smith Sr. (Author), H. Michael Marquardt (Editor), http://amzn.to/rCBHVe]