Joseph Smith receives two revelations (D&C 94 & 97) urging the creation of a city plat by "laying out and preparing a beginning." If the saints are obedient in building a temple, the City of Zion (in Missouri) will prosper and become glorious, and Zion cannot be "be moved" out of its place. It will "become glorious, very great and very terrible ... Surely Zion is the city of our God, and surely Zion cannot fall, neither be moved out of her place ..." The saints did not build a temple as commanded, and were subsequently driven out of Missouri by the Extermination Order.
[Source: D&C 94 & 97]