Good grief, I hope that THIS is not the only source of this phrase. I am remembering Plutarch but so far this is all I can find:
Plutarch, Is "Live Unknown" a Wise Precept? 3, p. 1129A: {Rhetorically addressing Epicurus} Don’t send books everywhere to advertise your wisdom to every man and woman ... What sense is there in so many tens of thousands of lines honoring Metrodorus, Aristobulus, and Chaeredemus, and published with so much industry that they cannot remain unknown even after they’re dead? Who are you to call for the obliteration of virtue, the uselessness of skills, silence to philosophy, and forgetfulness of good deeds?