D&C 118

 While in Far West, the Prophet Joseph Smith prophesied concerning the twelve - 

"...next spring let them depart to go over the great waters, and there promulgate my gospel, the fulness thereof, and bear record of my name.

5 Let them take leave of my saints in the city of Far West, on the twenty-sixth day of April next, on the building-spot of my house, saith the Lord."  (Doctrine and Covenants 118:4–5)

By the following spring, the saints had been run out of Missouri to Illinois.  I think one of the greatest and illogical acts of obedience took place on that day when the twelve returned the opposite way to go overseas at great risk to their lives - 

By the time April 26, 1839 arrived, the Saints had been completely driven from Missouri and into Illinois. Not only that, some of the Missourians knew of the plan of the Twelve to leave from Far West on that date. They were determined to prevent it, so that Joseph Smith would become a false prophet, at least as far as this prophecy was concerned. Any Mormons who entered Missouri were “fair game.  Nevertheless, the prophecy was fulfilled. Just after midnight, on April 26, 1839, Apostles Brigham Young, Heber C. Kimball, Orson Pratt, John E. Page, John Taylor, Wilford Woodruff, and George A. Smith, along with about twenty other members of the Church, gathered at the Far West Temple site, as a preliminary to the mission of several of the Twelve to England. They sang part of a hymn, rolled a large stone up to the southeast corner of the foundation, all seven of the Apostles present offered prayers, and then the group sang the hymn “Adam-ondi-Ahman.”  )Ridges, David J.. The Doctrine and Covenants Made Easier, Part 3 (The Gospel Studies Series) . Cedar Fort, Inc.. Kindle Edition.)

In the History of the Church, the following story was recorded - 

“As the Saints were passing away from the meeting, Brother Turley said to Elders Page and Woodruff, “Stop a bit, while I bid Isaac Russell [an apostate and enemy to the Church] good bye;” and knocking at the door, called Brother Russell. His wife answered, ‘Come in, it is Brother Turley.’ Russell replied, ‘It is not; he left here two weeks ago;’ and appeared quite alarmed; but on finding it was Brother Turley, asked him to sit down; but the latter replied, ‘I cannot, I shall lose my company.’ ‘Who is your company?’ enquired Russell. ‘The Twelve.’ ‘The Twelve!’ ‘Yes, don't you know that this is the twenty-sixth, and the day the Twelve were to take leave of their friends on the foundation of the Lord's House, to go to the islands of the sea? The revelation is now fulfilled, and I am going with them.’ Russell was speechless, and Turley bid him farewell. “The brethren immediately returned to Quincy, taking with them the families from Tenney's Grove” (History of the Church, Vol. 3, page 340).