Res Gestae
Ammianus Marcellinus
Ammianus Marcellinus. Ammianus Marcellinus, with an English translation, Vols. I-III. Rolfe, John C., translator. Cambridge, MA; London: Harvard University Press; W. Heinemann, 1935-1940 (printing).
For as the greatest glory is always habitually subject to envy,
v1.p.367
we read that even against the renowned leaders of ancient days faults and charges were trumped up, even if none could be discovered, by spiteful persons incensed by their brilliant exploits.