Liberty Jail is a former jail in Liberty, Missouri, United States, where Joseph Smith, founder of the Latter Day Saint movement, and other associates were imprisoned from December 1, 1838, to April 6, 1839, during the 1838 Mormon War. Latter Day Saints sometimes described it as a "prison temple" because of revelations received during Smith's imprisonment there, which are now recorded as sections 121, 122, and 123 of the LDS Doctrine and Covenants.