He is your friend who gets you out of a scrape.
More Portuguese Proverbs:
You need not find a shelter for an old ox.Portuguese
Grass doesn't grow on a busy street.
Portuguese
Everybody's friend or nobody's friend, is all one.
Portuguese
God permits, but not for ever.
Portuguese
There's no catching trouts with dry breeches.
Portuguese
The bird hunting a locust is unaware of the hawk hunting him.
Portuguese