The wise man will be cheated only once.
More Finnish Proverbs:
The back has to pay for what the ears didn't hear.Finnish
If you borrow some chaff from the rich man you have to repay him with wheat.
Finnish
Never judge a reindeer from close by when you got it from a rich man because you may find that some of the antlers are missing.
Finnish
The water is the same on both sides of the boat.
Finnish
Even a small star shines in the dark.
Finnish
Rain does not stay in the sky.
Finnish