While the cat is away, the mice will play.
More English Proverbs:
Nothing enters into a close hand.English
If you sell your purse to your wife, give your trousers into the bargain.
English
A man can't be hanged for his thoughts.
English
Don't drown the man who taught you to swim.
English
He that plays with cats must expect to be scratched.
English
A woman and a cherry are painted for their own harm.
English