He who digs a pit for others falls into it himself.
More German Proverbs:
Many look with one eye at what they give, but with seven at what they receive.German
New laws, new roguery.
German
An old man loved is a winter with flowers.
German
The one who wins plays best.
German
Saint Swithun's day, if thou be fair, for forty days it will remain; Saint Swithun's day, if thou bring rain, for forty days it will remain.
German
Vice often rides triumphantly in the coach of virtue.
German