A foul mouth must be provided with a strong back.
More Danish Proverbs:
God gives the will, necessity gives the law.Danish
As the man is, so is his speech.
Danish
He must have clean fingers who would blow another's nose.
Danish
Take not your sickle to another man's corn.
Danish
The watch-dog does not get sweet milk unless there be drowned mice in it.
Danish
Sparrows should not dance with cranes, their legs are too short.
Danish