Source, in full
Referring to the number of Virginia Military Institute alumni and former students among his officers; to Colonel Thomas T. Munford at the Battle of Chancellorsville (2 May 1863), as quoted in Chancellorsville (1996) by Stephen W. Sears, p. 242
Notes from Wikiquote
An incorrect version of this quote, "the Virginia Military Institute will be heard from today" is carved on the base of a statue of Jackson at VMI according to VMI.edu