A fair exchange is no robbery.
More Danish Proverbs:
When friends ask, there is no tomorrow.Danish
When the fox preaches to the goose her neck is in danger.
Danish
Sickness comes uninvited--no need to bespeak it.
Danish
No one so hard upon the poor as the pauper who has got into power.
Danish
Fools are like other folks as long as they are silent.
Danish
Stoop, and let it pass; the storm will have its way.
Danish