The Republic - pg. 244

"Isn't it also the same for the leader of a people who, taking
over a particularly obedient mob, does not hold back from
shedding the blood of his tribe but unjustly brings charges
against a man - which is exaclty what they usually they do
- and, bringing him before the court, murders him, and,
doing away with a man's life, tastes of kindred blood with
unholy tongue and mouth, and banishes, and kills, and hints
at cancellations of debts and redistributions of land; isn't it
also necessarily fated, I say, that after this such a man either
be slain by his enemies or be tyrant and turn from a human
being into a wolf?"