Revelation, 7 March 1832 [D&C 80]

which you have heard and verily believe and know to be  true. Behold this is the will of him who hath called you  Your Redeemer even Jesus Christ Amen—— [p. 19]
Several revelations in the early church called particular individuals to be missionaries, typically assigning them to labor in specific regions. Though the location of his service was to be at his discretion, teenager Stephen Burnett, one of the church’s youngest high priests, received the call to preach on 7 March 1832. After he accepted the assignment, Eden Smith, eight years his senior, accompanied him on the mission.
JS and Frederick G. Williams recorded this text in Revelation Book 2 in March 1832, identifying the location and date as “Hiram Portage County Ohio March 7th 1832.” John Whitmer subsequently copied this revelation into Revelation Book 1, where it is designated “A Revelation given Hiram Portage County Ohio March 17. 1832”. (The “1” in “ March 17” appears to be a later addition.) The 1835 Doctrine and Covenants included this revelation, giving the date of March 1832 but no location.