If you have a friend who is a doctor, then send him to your enemy’s house.
More Portuguese Proverbs:
Children tell in the highway what they hear by the fireside.Portuguese
He is no great heir that inherits not his ancestor's virtues.
Portuguese
The envious man's face grows lean and his eye swells.
Portuguese
Don't make yourself poor to one who won't make you rich.
Portuguese
Every fly has its shadow.
Portuguese
Give a little, take a little.
Portuguese