To lather an ass’s head is only wasting soap.
More Spanish Proverbs:
When one wolf eats another, thee is nothing to eat in the wood.Spanish
It is fair and just to cheat the cheater.
Spanish
Tell a lie and find the truth.
Spanish
Better a quiet death than a public misfortune.
Spanish
When the spleen increases, the body diminishes.
Spanish
He who is proud of his sins, sins twice as much.
Spanish