Trust not a horse’s heels.
More Portuguese Proverbs:
Good fruit never comes from a bad tree.Portuguese
Talk of the wolf and behold his skin.
Portuguese
Rise early, and you will observe; labour, and you will have.
Portuguese
He that does ill never wants for excuses.
Portuguese
Don't let the cat out of the bag.
Portuguese
A great thrust of a lance at a dead Moor.
Portuguese