“He Touched Every One of Them with His Finger Save It Were the Three”

Joseph F. McConkie, Robert L. Millet
Though it is unclear why the Lord touched the nine (but did not touch the three who were to tarry), or what might have been involved in doing this, the action at least illustrates that the two groups would have differing ministries.

Doctrinal Commentary on the Book of Mormon, Vol. 4