The Salt Sermon was an oration delivered on June 17, 1838, by Sidney Rigdon in Caldwell County, Missouri. The sermon was a stern condemnation of Mormon dissenters, including Oliver Cowdery, David Whitmer, John Whitmer, and William W. Phelps. At the time, Sidney Rigdon was first counselor in the First Presidency of The Church of Jesus Christ of Latter-day Saints.