He who is caught in a lie is not believed when he tells the truth.
More Spanish Proverbs:
Prison and Lent were made for the poor.Spanish
A barking dog was never a good biter.
Spanish
My neighbour's goat gives more milk than mine.
Spanish
Milk the cow that standeth still.
Spanish
Let those pater nosters be for your own soul. (Ironical, against swearing.)
Spanish
It is in putting it into the oven that the loaf is made crooked.
Spanish