Welcome back Buck :)
How's the progress coming along since you became an unbaptized associate? Two scriptures that are used quite often are Matthew 28:19 and Acts 20:20, however later on you will actually learn that the Greek scriptures were primarily written for "the annointed" and so technically THEY are the ones who were commanded to do the preaching work. I do not see any scriptural support for that to extend to the "great crowd" of "other sheep". I must have missed that meeting or publication when that "new light" was dispensed.