All bite the bitten dog.
More Portuguese Proverbs:
One wolf does not kill another.Portuguese
For lack of men they made my father a justice.
Portuguese
Little chips kindle fire, and big logs sustain it.
Portuguese
If you laugh to-day, you will cry to-morrow.
Portuguese
Under the sackcloth there is something else.
Portuguese
Chastise the good man, he will grow better; chastise the bad, and he will grow worse.
Portuguese