As you do, so will be done to you.
More Jewish Proverbs:
If you ever need a helping hand you'll find one at the end of your arm.Jewish
Rejoice not at thine enemy's fall - but don't rush to pick him up either.
Jewish
Love does not pay attention to dignity.
Jewish
The best doctor is to be found in hell.
Jewish
The kind man feeds his cat before sitting down to dinner.
Jewish
Don't open a shop unless you know how to smile.
Jewish