He fears the sack who has been in it.
More Danish Proverbs:
It is not easy to walk upon the devil's ice.Danish
If the hen did not cackle no one would know what she had been about.
Danish
When anger blinds the eyes, truth disappears.
Danish
Give a rogue an inch, and he will take an ell.
Danish
The anvil does not fear a good sledge-hammer.
Danish
Hair does not grow faster by being pulled.
Danish