See Revelation 19:10.
According to Eliza R. Snow’s brief description of this discourse in her journal, JS “exhorted the people in impressive terms to be diligent—to be up and doing lest the tabernacle pass over to another people and we lose the blessing.” (Eliza R. Snow, Journal, 13 June 1843.)
Snow, Eliza R. Journal, 1842–1844. CHL. MS 1439.