You may get something off a bone, but nothing off a stone.
More Danish Proverbs:
When it rains porridge the beggar has no spoon.Danish
Before a man learns to hang he is half dead.
Danish
Better one cow in peace than seven in trouble.
Danish
Lies and Latin go round the world.
Danish
One to one, and two to the devil.
Danish
A single bag of money is stronger than two bags of truth.
Danish