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).
To conclude, we know that to the very end of his reign, and of his life, he observed this rule profitably, not to remit arrears of tribute by so-called indulgencies. For he had
However, in the midst of these courses of wise governing, worthy of the imitation of good emperors, the fury of the savages had blazed forth again more than ever.
And as wild beasts accustomed to live by plundering when their guards are slack do not cease even when these guards are removed and stronger ones put in their place, but ravening with hunger rush upon flocks or herds without regard for their own lives: so they too, when they had used up all that they had seized by pillage, urged on by hunger, were continually driving off booty, and sometimes perishing of want before finding anything.